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2017 Mercedes-Benz GLC-Class problems, recalls and owner complaints
What the 2017 Mercedes-Benz GLC-Class has been recalled for, how often it fails the UK MOT and what owners report, from official government data. Updated October 25, 2026.
- 0safety recalls
- 117owner complaints
- 5crash reports
- 3fire reports
- 14%fail the UK MOT
117 complaints, against an average of 68 for the other 10 Mercedes-Benz GLC-Class model years.
Every Mercedes-Benz GLC-Class model year with its number of owner complaints. Pick a year to compare.
What goes wrong with the 2017 Mercedes-Benz GLC-Class?
The components named most often in the 117 owner complaints. One complaint can name several, so the shares can add up to more than 100%.
What symptoms do 2017 Mercedes-Benz GLC-Class owners describe?
Found by reading the text of all 117 owner complaints. Tap a symptom for the answer, a real owner quote and any related recall.
- Why is the check engine light on in my 2017 Mercedes-Benz GLC-Class?14 owners · 12%
- Can the sunroof on the 2017 Mercedes-Benz GLC-Class shatter or fail?9 owners · 7.7%
- Why does my 2017 Mercedes-Benz GLC-Class smell of fuel or gas?7 owners · 6%
- Why does the seat belt not latch or retract properly in my 2017 Mercedes-Benz GLC-Class?7 owners · 6%
- Why does my 2017 Mercedes-Benz GLC-Class stall, lose power or shut off while driving?6 owners · 5.1%
- Has the 2017 Mercedes-Benz GLC-Class had engine failures?4 owners · 3.4%
Has the 2017 Mercedes-Benz GLC-Class been recalled?
NHTSA lists no safety recalls for the 2017 Mercedes-Benz GLC-Class as of October 25, 2026. Recalls can be issued at any time, so check your VIN before you rely on this.
Is the 2017 Mercedes-Benz GLC-Class recalled in the UK or Europe?
Recalls issued by the UK's DVSA and through the EU's Safety Gate system that cover this model and build period. European models can differ from U.S. ones, and "years estimated" means the recall gave no build dates, so confirm your own car with your registration or VIN.
UK DVSASRPC2603 - Drive Shaft JointDrive Shaft Joint
Risk: Mercedes-Benz AG has determined that on certain 4MATIC E-Class (213 platform) S-Class Coupé (217 platform) S-Class (222 platform) E-Class Coupe/Convertible (238 platform) GLC (253 platform) and CLS (257 platform) vehicles increased wear of the universal joint on the drive shaft might occur.
Fix: As a remedy Mercedes-Benz AG via its Mercedes-Benz service partners will check the drive shaft on the affected vehicles and replace it if necessary.
UK DVSAOn affected vehicles the panel located between the windshield and the panoramic sunroof might not have been bonded correctly during a…On affected vehicles the panel located between the windshield and the panoramic sunroof might not have been bonded correctly during a prior service repair.
Risk: On affected vehicles the panel located between the windshield and the panoramic sunroof might not have been bonded correctly during a prior service repair.
Fix: Check the front fixed element of the panoramic sliding sunroof and replace if necessary.
UK DVSAOn affected vehicles the aluminium bolts of the steering gear could corrode and break due to the intrusion of moisture.
Risk: On affected vehicles the aluminium bolts of the steering gear could corrode and break due to the intrusion of moisture.
Fix: Replace the steering gear mounting bolts on the affected vehicles with steel bolts. Should the bolts break or already be broken change the steering gear.
UK DVSACoolant pump might have a leakage between the vacuum system and the coolant circuit
Risk: On certain vehicles with a Diesel engine the coolant pump which is controlled by vacuum might have a leakage between the vacuum system and the coolant circuit.
Fix: Update the software of the coolant pump and replace the electrical switch valve on the affected vehicles.
UK DVSAThe behaviour of the emergency call system might not meet specifications
Risk: The behaviour of the emergency call system might not meet specifications.
Fix: Update the software of the communication module for the emergency call system.
UK DVSAThe behaviour of the emergency call system might not meet specifications
Risk: The behaviour of the emergency call system might not meet specifications.
Fix: Update the software of the communication module for the emergency call system.
UK DVSAThe behaviour of the emergency call system might not meet specifications
Risk: The behaviour of the emergency call system might not meet specifications.
Fix: Update the software of the communication module for the emergency call system.
UK DVSAThe behaviour of the emergency call system might not meet specifications
Risk: The behaviour of the emergency call system might not meet specifications.
Fix: Update the software of the communication module for the emergency call system.
UK DVSAVehicles with a panoramic sunroofthe polycarbonate panel may not have been bonded correctly during a prior service repair
Risk: The polycarbonate panel located between the windshield and the panoramic sunroof may not have been bonded correctly during a prior service repair.
Fix: Remove the bonded panel and install a new polycarbonate panel if required.
UK DVSAThe behaviour of the emergency call system might not meet specifications
Risk: The behaviour of the emergency call system might not meet specifications.
Fix: Update the software of the communication module for the emergency call system.
UK DVSAThe behaviour of the emergency call system might not meet specifications
Risk: The behaviour of the emergency call system might not meet specifications.
Fix: Update the software of the communication module for the emergency call system.
UK DVSAThe behaviour of the emergency call system might not meet specifications
Risk: The behaviour of the emergency call system might not meet specifications.
Fix: Update the software of the communication module for the emergency call system.
UK DVSAThe connection of the gas lines of the inertisation system might not meet specifications
Risk: The connection of the gas lines of the inertisation system might not meet specifications.
Fix: Check and if necessary rework the gas lines of the inertisation system.
UK DVSAThe behaviour of the emergency call system might not meet specifications
Risk: The behaviour of the emergency call system might not meet specifications.
Fix: Update the software of the communication module for the emergency call system.
UK DVSAThe emergency call system might not meet specifications
Risk: The behaviour of the emergency call system might not meet specifications.
Fix: Update the software of the communication module for the emergency call system.
UK DVSAThe behaviour of the emergency call system might not meet specifications
Risk: The behaviour of the emergency call system might not meet specifications.
Fix: Update the software of the communication module for the emergency call system.
UK DVSAThe behaviour of the emergency call system might not meet specifications
Risk: The behaviour of the emergency call system might not meet specifications.
Fix: Update the software of the communication module for the emergency call system.
UK DVSAThe emergency call system might not meet specifications
Risk: The behaviour of the emergency call system might not meet specifications.
Fix: Update the software of the communication module for the emergency call system.
UK DVSAThe behaviour of the emergency call system might not meet specifications
Risk: The behaviour of the emergency call system might not meet specifications.
Fix: Update the software of the communication module for the emergency call system.
UK DVSAThe communication module may be deactivated
Risk: The communication module may be deactivated
Fix: Carry out a check of the configuration of the communication module on affected vehicles and if necessary activate the communication module.
UK DVSAThe software of certain communication modules may not meet specifications
Risk: The software of certain communication modules may not meet specifications.
Fix: Carry out an update to the software of the communication module on affected vehicles.
UK DVSAThe emergency call system (ecall) does not meet the specification
Risk: On affected vehicles the software of the communication module for the emergency call system does not meet the specification
Fix: Update the software of the communication module for the emergency call system
UK DVSAEngine control unit software to be updated
Risk: Improve the vehicle emissions via software updates.
Fix: Update the relevant control unit's software and if necessary replace the NOx sensors.
UK DVSAThe status of the front passenger airbags displayed in the centre console might not be indicated correctly
Risk: The status of the front passenger airbags displayed in the centre console might not be indicated correctly.
Fix: The affected vehicles head unit software will be updated
UK DVSATo improve emissions of the affected vehicles.certain calibrations of functionalities must be changed in the engine management
Risk: Improve the vehicle emissions via software updates.
Fix: Update the diesel engine control unit software and add a supplementary booklet for the operator's manual
UK DVSAElectrical wiring in steering assembly may be insufficiently grounded
Risk: The steering column clock spring may break. This will cause warning messages to illuminate in the instrument cluster but in extreme instances it may cause the driver's airbag to deploy.
Fix: Affected vehicles will be recalled to establish sufficient grounding of the steering components
UK DVSAAirbag control unit connection may not be manufactured to specificationYears estimated
Risk: The connector pins of the occupant classification system to the airbag control unit might have been manufactured outside specification. After a period of time this may cause decativation of the passnger airbag.
Fix: On affected vehicles replace the connector pins of the occupant classification system.
UK DVSASteering components may be insufficiently grounded
Risk: It has been determined that the steering airbag electrical components are insufficiently grounded. Failure of the steering column module clock spring could result in an inadvertent deployment of the driver airbag which may cause risk of injury to the driver and an increased risk of a potential collision.
Fix: On affected vehicles the manufacturer will fit a contact bridge to the outer race of the steering column top bearing which will provide correct grounding.
UK DVSAElectrical wiring in steering assembly may be insufficiently grounded
Risk: The steering column clock spring may break. This will cause warning messages to illuminate in the instrument cluster but in extreme instances it may cause the driver's airbag to deploy.
Fix: Affected vehicles will be recalled to establish sufficient grounding of the steering components.
UK DVSAElectrical wiring in steering assembly may be insufficiently grounded
Risk: The steering column clock spring may break. This will cause warning messages to illuminate in the instrument cluster but in extreme instances it may cause the driver's airbag to deploy.
Fix: Affected vehicles will be recalled to establish sufficient grounding of the steering components.
UK DVSABonding of the windshield may be inadequateYears estimated
Risk: The bonding of the windshield in the lower area may not correspond to the specification. During a collision the bonding may fail and the windscreen may detach. This could have an adverse affect on the effectiveness of the passenger airbag.
Fix: On affected vehicles check bonding and if necessary replace windscreen.
UK DVSAFront seat belt tensioners may not function
Risk: The front seatbelt pre-tensioner ignitors may not perform as expected. This could increase the risk of injury to the seat occupants. The lock function of the seatbelts is not impaired.
Fix: On affected vehicles replace seatbelts with quality assured units.
UK DVSAElectrical wiring in steering assembly may be insufficiently grounded
Risk: The steering column clock spring may break. This will cause warning messages to illuminate in the instrument cluster but in extreme instances it may cause the driver's airbag to deploy.
Fix: Affected vehicles will be recalled to establish sufficient grounding of the steering components.
UK DVSAFront and side plastic covers of the panoramic sunroof may not be bonded to specificationYears estimated
Risk: The bonding retaining front and side plastic covers on the sunroof may not meet specification. As a result these could detach whilst the vehicle is in motion.
Fix: On affected vehicles check trims and where necessary re-bond trims.
UK DVSARight front seat belt pre-tensioner may not meet specification
Risk: The right front seat belt pretensioner may not conform to specification . This may adversely affect it's operation in the event of an accident.
Fix: Replace the pretensioner on affected vehicles.
UK DVSALeft front seat belt pre-tensioner may not meet specification
Risk: The propellant mix in certain seatbelt pre-tensioners ignitors may be incorrect. If the front seatbelt pre-tensioners are deployed the lock function of the pre-tensioners cannot be guaranteed.
Fix: Recall the vehicles that are likely to be affected and replace the front seatbelts that are likely to be affected.
UK DVSAStarting current limiter may overload
Risk: Where the car incurs severe engine damage resulting in the engine failing to turn over (engine seizure) and if the driver repeatedly attempts to start the engine despite the engine not cranking the very high electrical current could lead to overheating of the starting current limiter and the potential for a fire.
Fix: Recall the vehicles that are likely to be affected and install an additional fuse in the electrical line to the starter.
UK DVSAFaulty control unit may cause vehicle to perform outside specification
Risk: Where a control unit coding was updated in a workshop between 3 December 2016 and 5 December 2016 the coding may not correspond to the specification and may trigger unplanned action in the vehicle. The safety and emissions systems may not react as design intent.
Fix: Recall the vehicles that are likely to be affected and update the software in the corresponding control units.
EU Safety GateThe three aluminium screws of the steering box may corrode due to exposure to spray water and aggressive road-grit (salt) used for melting…The three aluminium screws of the steering box may corrode due to exposure to spray water and aggressive road-grit (salt) used for melting ice. Advanced corrosion could weaken the screws, leading to potential breakage during manoeuvring or parking. If all fixing screws fail, the power-assisted steering could detach, resulting in a loss of power steering and an increased risk of an accident.
Measures: Type of economic operator taking notified measure(s): Manufacturer; Category of measure(s): Recall of the product from end users; Date of entry into force: Unknown
EU Safety GateThe aluminium bolts of the steering box may break.This can lead to detachment of the steering box from the power block, creating a risk of an accident.
Measures: Type of economic operator taking notified measure(s): Manufacturer; Category of measure(s): Recall of the product from end users; Date of entry into force: Unknown
EU Safety GateThe vacuum-controlled coolant pump may not be tightly sealed between the coolant and vacuum circuits.This may result in the coolant leaking into the vacuum circuit leading to an electrochemical reaction, increasing the risk of fire.
Measures: Type of economic operator taking notified measure(s): Manufacturer; Category of measure(s): Recall of the product from end users; Date of entry into force: Unknown
EU Safety GateA trapped particle may damage the sealing between the fuel rail and fuel injector, which could cause fuel to leak into the engine…A trapped particle may damage the sealing between the fuel rail and fuel injector, which could cause fuel to leak into the engine compartment. Consequently, leaking fuel may come into contact with hot parts of the engine, increasing the risk of fire.
Measures: Type of economic operator taking notified measure(s): Manufacturer; Category of measure(s): Recall of the product from end users; Date of entry into force: Unknown
EU Safety GateThe polycarbonate roof panel located between the windscreen and the panoramic roof may not have been bonded correctly to the vehicle…The polycarbonate roof panel located between the windscreen and the panoramic roof may not have been bonded correctly to the vehicle during a prior repair. In such cases, the adhesive bonding could gradually deteriorate and the panel could become detached from the vehicle, posing a risk to other road users.
Measures: Type of economic operator taking notified measure(s): Manufacturer; Category of measure(s): Recall of the product from end users; Date of entry into force: Unknown
EU Safety GateFaulty connection of the inerting system’s gas pipes could impair the intended distribution of argon shielding gas to the points where…Faulty connection of the inerting system’s gas pipes could impair the intended distribution of argon shielding gas to the points where there could be contact between the leaking refrigerant R1234yf and hot engine components in the event of an accident.This would reduce the cooling effect of the inerting gas, leading to increased risk of fire.
Measures: Type of economic operator taking notified measure(s): Manufacturer; Category of measure(s): Recall of the product from end users; Date of entry into force: Unknown
EU Safety GateThe fixing screw connecting the base holder of the manual control device may not be correctly fitted.This can impair the control over the vehicle, increasing the risk of an accident.
Measures: Type of economic operator taking notified measure(s): Manufacturer; Category of measure(s): Recall of the product from end users; Date of entry into force: Unknown
EU Safety GateThe sleep mode functionality of the electronic parking brake within the electronic stability programme (ESP) software may be defective.As a result, the brake lights may be permanently activated or the ESP function could be deactivated, increasing the risk of an accident.
Measures: Type of economic operator taking notified measure(s): Manufacturer; Category of measure(s): Recall of the product from end users; Date of entry into force: Unknown
EU Safety GateIn vehicles with automatic child-seat detection, the status shown in the centre console of the passenger airbags may not be correctly…In vehicles with automatic child-seat detection, the status shown in the centre console of the passenger airbags may not be correctly indicated. In this case, the vehicle users would not be correctly informed of the actual activation status of the passenger airbag and may not react appropriately to a potentially false passenger classification, thereby increasing the risk of injury for passengers in the event of an accident.
Measures: Type of economic operator taking notified measure(s): Manufacturer; Category of measure(s): Recall of the product from end users; Date of entry into force: Unknown
EU Safety GateThe steering column is not sufficiently earthed.As a result, in the event of an electrostatic discharge, the driver's airbag may be triggered when not required. This could cause an accident.
Measures: Type of economic operator taking notified measure(s): Manufacturer; Category of measure(s): Recall of the product from end users; Date of entry into force: Unknown
EU Safety GateThe starter current limiter may be overloaded and overheat.As a consequence, the surrounding components could ignite, leading to a fire.
Measures: Type of economic operator taking notified measure(s): Manufacturer; Category of measure(s): Recall of the product from end users; Date of entry into force: 01/09/2017
EU Safety GateThe propellant mixing ratio in certain seat-belt pre-tensioner igniters may be incorrect.As a result, in the event of an accident where the front seat-belt pre-tensioners are activated, the pre-tensioners would not provide the restraint performance required if the igniter did not ignite as intended. This could put the occupants at a greater risk of injury.
Measures: Type of economic operator taking notified measure(s): Manufacturer; Category of measure(s): Recall of the product from end users; Date of entry into force: Unknown
EU Safety GateFollowing the update of the control unit coding, the coding parameters of the control unit could be defective.This could give rise to various unplanned reactions in the vehicle: the wrong airbag could be triggered in the event of an accident, the airbag control unit may not recognise the belt buckle status, the engine control unit could be coded with a false maximum speed or various assistance systems may not function.
Measures: Type of economic operator taking notified measure(s): Manufacturer; Category of measure(s): Recall of the product from end users; Date of entry into force: Unknown
How often does the 2017 Mercedes-Benz GLC-Class fail its MOT?
Why they failed: the share of failed tests with at least one fault in each area (a test can fail on several). Cars first registered in 2017, tested in Great Britain in 2023; first registration is usually, but not always, the model year. Source: DVSA anonymised MOT tests and results, Open Government Licence v3.0.
What do 2017 Mercedes-Benz GLC-Class owners report?
12 of the 117 complaints, the most recent for the most-reported components, as the owners wrote them. NHTSA removes names and VINs; long reports are trimmed. CarHooq has not verified individual claims.
Independent service company said the car has a raw fuel smell under the vehicle. Signs of fuel leak at the connection between the high pressure fuel rail / high pressure fuel pump line. Mentioned a recall campaign of 2022030003. That addresses this issue. I contacted Mercedes Benz dealers (2) and they said my VIN does not show a recall. The recall does show up online via an AI search and it is supposed to cover 2016-2020 GLCs like ours. Don't know why this is. Can you help?
The contact's wife owns a 2017 Mercedes-Benz GLC300. The contact stated that while the vehicle was parked in the driveway, the air bags inadvertently deployed without impact to the vehicle. The vehicle was towed to the dealer and remained with the dealer for over a month. The contact was called by the dealer and informed to retrieve the vehicle even though the cause of the failure was not yet determined. The contact notified the manufacturer and was informed that the issue was under investigation. The vehicle remained unrepaired with the dealer. The failure mileage was approximately 189,800.
I smell gas in my car. There is a recall for the fuel parts on the 2019. I have a 2017 with the same issue.
The contact owns a 2017 Mercedes-Benz GLC300. The contact stated that while parked and attempting to release the seat belt, the seat belt remained latched. The contact stated that after the third attempt, the seat belt operated as needed. The failure had occurred in the front driver’s and passenger’s side seat belts. The vehicle was taken to a dealer, where it was determined that the buckle and needed to be replaced. The seat belt buckle was replaced, and the vehicle was repaired. The manufacturer was notified of the failure but offered no assistance because the warranty had expired. The…
The contact owns a 2017 Mercedes-Benz GLC300. The contact stated while driving at an undisclosed speed, the messages "Driver’s Air Bag Malfunction - Service Required" and "Collision Prevention Assist Unavailable" were displayed. The vehicle was taken to an independent mechanic who diagnosed and determined that the air bag had malfunctioned. The vehicle was not repaired. The contact called the dealer, but the vehicle was not inspected or repaired. The manufacturer was made aware of the failure and referred the contact to the NHSTA Hotline for assistance. The failure mileage was approximately…
The contact owns a 2017 Mercedes-Benz GLC300. The contact stated that while driving approximately 30 MPH, the first panel of the panoramic sunroof went off track and failed to close as intended. The contact stated that while inspecting the vehicle, the panoramic sunroof glass was pushed down firmly, and the sunroof closed. The contact attempted to open the sunroof, but the sunroof failed to operate as intended; however, the contact heard a motorized sound coming from the sunroof. The vehicle was not diagnosed or repaired. The manufacturer was notified of the failure and referred the contact to…
The Valve body control failed. I took the car into the dealership but upon doing some searching this seems to be a common issue amongst owners of this vehicle/make model. The transmission won't go beyond 5th gear (of 9) so it's is dangerous to drive on the interstate. The car doesn't shift into drive, only shifts into N, the reverts automatically to park. It required the engine shutting on/off multiple times and only then does it go into 3rd gear, causing the vehicle to jump due to missing gears. This issue could leave an owner stranded at any time and cause injury due to the limitations of…
My vehicle goes into neutral while driving which poses a major risk.
Odometer Fraud. The contact purchased a 2017 Mercedes-Benz GLC43 AMG. The contact stated that while reviewing a Carfax report, it was discovered that there was a mileage discrepancy. The vehicle was a private sale. At the time of purchase, the vehicle mileage was 74,000 and at the time of registration, it was discovered that the mileage was 140,000.
-The malfunctioned component is the Positive Crankcase Ventilation. - Vehicle wanted to stall and did not want to accelerate while in the middle lane on the highway with my family. - Yes it has been diagnosis by certified mechanic - The check engine light turned on at the time of the incident and has been turning on and off ever since.
I was driving and my engine light came on. I ran the code and it came up as P052E which has to do with the positive crankcase ventilation regulator valve. I’ve heard that this part goes out very often on the Mercedes Benz.
Error message of collision prevention assist inoperable. Mercedes dealer wants $400 to look at it only.
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2017 Mercedes-Benz GLC-Class: questions owners ask
Is the 2017 Mercedes-Benz GLC-Class reliable?
NHTSA data alone cannot rate reliability, but it shows what owners reported. Owners filed 117 complaints with NHTSA about the 2017 Mercedes-Benz GLC-Class; the most common categories were engine (40, 34.2%), electrical system (17, 14.5%), fuel/propulsion system (16, 13.7%). There are no safety recalls listed for this model year. 5 complaints mention a crash, 3 mention a fire, 3 injuries were reported.
What are the most common problems with the 2017 Mercedes-Benz GLC-Class?
Across 117 owner complaints filed with NHTSA, the categories mentioned most often are engine (34.2% of complaints), electrical system (14.5% of complaints), fuel/propulsion system (13.7% of complaints), air bags (12% of complaints), seat belts (7.7% of complaints). One complaint can name several components.
Does the 2017 Mercedes-Benz GLC-Class have any recalls?
As of October 2026, NHTSA lists no safety recalls for the 2017 Mercedes-Benz GLC-Class. Recalls can be issued at any time, so check your VIN at nhtsa.gov/recalls.
Why is the check engine light on in my 2017 Mercedes-Benz GLC-Class?
14 of the 117 owner complaints NHTSA has on file for the 2017 Mercedes-Benz GLC-Class (12%) describe the check engine light coming on. One owner wrote: "-The malfunctioned component is the Positive Crankcase Ventilation. - Vehicle wanted to stall and did not want to accelerate while in the middle lane on the highway with my family." (NHTSA complaint 11654950, April 2025). If it happens to your car, check your VIN for open recalls at nhtsa.gov/recalls and report the problem to NHTSA; complaints are what trigger investigations.
Can the sunroof on the 2017 Mercedes-Benz GLC-Class shatter or fail?
9 of the 117 owner complaints NHTSA has on file for the 2017 Mercedes-Benz GLC-Class (7.7%) describe the sunroof or panoramic roof shattering, exploding or failing. One owner wrote: "The Panoramic roof glass exploded suddenly. Throwing shattered glass pieces on the Highway and into the cabin of the car. No object or environmental conditions caused this incident. It just exploded while driving ~ 50mph" (NHTSA complaint 11497913, December 2022). If it happens to your car, check your VIN for open recalls at nhtsa.gov/recalls and report the problem to NHTSA; complaints are what trigger investigations.
Why does my 2017 Mercedes-Benz GLC-Class smell of fuel or gas?
7 of the 117 owner complaints NHTSA has on file for the 2017 Mercedes-Benz GLC-Class (6%) describe a fuel or gasoline smell, or a fuel leak. One owner wrote: "Independent service company said the car has a raw fuel smell under the vehicle. Signs of fuel leak at the connection between the high pressure fuel rail / high pressure fuel pump line. Mentioned a recall campaign of 2022030003. That addresses this issue." (NHTSA complaint 11772698, October 2026). If it happens to your car, check your VIN for open recalls at nhtsa.gov/recalls and report the problem to NHTSA; complaints are what trigger investigations.
Why does the seat belt not latch or retract properly in my 2017 Mercedes-Benz GLC-Class?
7 of the 117 owner complaints NHTSA has on file for the 2017 Mercedes-Benz GLC-Class (6%) describe seat belts not latching, retracting or locking. One owner wrote: "No incident my vehicle has a front left malfunction service required light and issues with the passenger seatbelt not proper latching. Upon checking I notice my car had previous recalls done. It seems as if the same issues has come about." (NHTSA complaint 11664823, June 2025). If it happens to your car, check your VIN for open recalls at nhtsa.gov/recalls and report the problem to NHTSA; complaints are what trigger investigations.
Why does my 2017 Mercedes-Benz GLC-Class stall, lose power or shut off while driving?
6 of the 117 owner complaints NHTSA has on file for the 2017 Mercedes-Benz GLC-Class (5.1%) describe the engine stalling, losing power or shutting off while driving. One owner wrote: "-The malfunctioned component is the Positive Crankcase Ventilation. - Vehicle wanted to stall and did not want to accelerate while in the middle lane on the highway with my family." (NHTSA complaint 11654950, April 2025). If it happens to your car, check your VIN for open recalls at nhtsa.gov/recalls and report the problem to NHTSA; complaints are what trigger investigations.
Has the 2017 Mercedes-Benz GLC-Class had engine failures?
4 of the 117 owner complaints NHTSA has on file for the 2017 Mercedes-Benz GLC-Class (3.4%) describe complete engine failure or a replaced engine. One owner wrote: "There are lots of 2017 GLC 300 that has been having issues with PCV system that are malfunctioning that could cause engine failure. Customers are forced to spend $2000 plus to have this fixed rather than Mercedes owning its problem and fixing it." (NHTSA complaint 11519210, April 2023). If it happens to your car, check your VIN for open recalls at nhtsa.gov/recalls and report the problem to NHTSA; complaints are what trigger investigations.
Check your own GLC-Class
Counts are a starting point, not a verdict: popular models collect more complaints because more of them are on the road, and NHTSA does not verify individual reports. To see whether a recall is still open on your car, enter your VIN at nhtsa.gov/recalls (U.S.) or your registration at check-vehicle-recalls.service.gov.uk (UK). Had a safety problem? Report it to NHTSA; complaints are what trigger investigations and recalls.
Data: NHTSA Office of Defects Investigation recall and complaint databases (public domain), DVSA anonymised MOT results (Open Government Licence v3.0), DVSA vehicle recalls (Open Government Licence v3.0), EU Safety Gate alerts (© European Union), retrieved October 25, 2026. Model year 2017 only; combines NHTSA's entries for GLC-CLASS and GLC-CLASS COUPE.