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2014 Mercedes-Benz SLK-Class problems, recalls and owner complaints
What the 2014 Mercedes-Benz SLK-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
- 3owner complaints
- 0crash reports
- 0fire reports
- 20%fail the UK MOT
The least complained-about Mercedes-Benz SLK-Class year on file: 3 complaints, against an average of 8 for the other model years.
Every Mercedes-Benz SLK-Class model year with its number of owner complaints. Pick a year to compare.
What goes wrong with the 2014 Mercedes-Benz SLK-Class?
The components named most often in the 3 owner complaints. One complaint can name several, so the shares can add up to more than 100%.
Has the 2014 Mercedes-Benz SLK-Class been recalled?
NHTSA lists no safety recalls for the 2014 Mercedes-Benz SLK-Class as of October 25, 2026. Recalls can be issued at any time, so check your VIN before you rely on this.
Is the 2014 Mercedes-Benz SLK-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 DVSAThe driver's air bag may have a chemical change to its propellant over time
Risk: The driver's airbag may have a chemical change to its propellant over time.
Fix: Replace the driver's airbag.
UK DVSAThe driver's air bag may have a chemical change to its propellant over time
Risk: The driver's airbag may have a chemical change to its propellant over time.
Fix: Replace the driver's airbag
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 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.
UK DVSAOil may leak
Risk: On certain diesel engines the 'O' ring may not have been produced to the correct specification. This may allow oil to leak and contaminate the environment. If excessive oil is lost engine damage may occur.
Fix: On affected vehicles replace the chain tensioner sealing ring.
EU Safety GateFaulty configurations of the control units (traction systems, signal recording triggering modules, engine control units and headlights)…Faulty configurations of the control units (traction systems, signal recording triggering modules, engine control units and headlights) could cause one or more control units to malfunction, which could increase the risk of an accident. The exhaust emissions exceed the legal limits, posing a risk to the environment.
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 driver and passenger airbags of the company Takata in vehicles with ammonium nitrate gas generators without drying agents could, under…The driver and passenger airbags of the company Takata in vehicles with ammonium nitrate gas generators without drying agents could, under certain climate conditions, lead over time to a chemical change in the fuel.In the event of an accident triggering the release of the driver or passenger airbag, this change could cause the gas generators to burst. If a gas generator ruptures, the airbag would then have no restraining function and loose parts from the gas generator could reach the vehicle interior. This would increase the risk of injury for passengers.
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 gasket seal for the engine's chain tensioner may display incorrect settling behaviour.Over time, this may result in the chain tensioner detaching from the threaded hole on the cylinder head and the leakage of engine oil. The loss of large amounts of engine oil may contaminate the road, leading to a possible hazard for traffic following behind.
Measures: Type of economic operator taking notified measure(s): Other; Category of measure(s): Recall of the product from end users; Date of entry into force: Unknown
EU Safety GateThe passenger front airbag module was not fitted properly and parts of it may come loose in the event that it is deployed.
Measures: Type of economic operator taking notified measure(s): Other; Category of measure(s): Recall of the product from end users; Date of entry into force: Unknown
How often does the 2014 Mercedes-Benz SLK-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 2014, 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 2014 Mercedes-Benz SLK-Class owners report?
2 of the 3 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.
THERE IS A PROBLEM WITH THE AIR TO AIR INTER-COOLER DESIGN THAT CAUSES WATER TO COLLECT AND THEN BE INGESTED INTO THE ENGINE UNDER SUDDEN ACCELERATION. THE INGESTION OF THE WATER CAUSES THE COMPUTER TO BELIEVE THERE IS AN ENGINE PROBLEM AND PUTS IT INTO "LIMP MODE"; SUDDENLY AND SEVERELY CUTTING POWER. WHEN THIS HAPPENS AT HIGHWAY SPEEDS (60/70 MPH), IN TRAFFIC, IT CAUSES SITUATIONS THAT ARE POTENTIALLY VERY DANGEROUS. THE PROBLEM IS EXACERBATED AT NIGHT AND/OR DURING BAD WEATHER WHERE VISIBILITY IS BAD AND ROAD CONTROL IS REDUCED. NOTE THAT THIS ONLY HAPPENS DURING VERY HUMID…
ROOF LEAKS PASSENGER SIDE. HAVE TAKEN IT INTO THE DEALER 4 TIMES BETWEEN NOV 2014 AND APR 2015 (2-1/2 MONTHS IN SHOP PLUS 97 MILES DRIVEN) AND STILL HAS NOT BEEN FIXED. *TR
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2014 Mercedes-Benz SLK-Class: questions owners ask
Is the 2014 Mercedes-Benz SLK-Class reliable?
NHTSA data alone cannot rate reliability, but it shows what owners reported. Owners filed 3 complaints with NHTSA about the 2014 Mercedes-Benz SLK-Class; the most common categories were structure (2, 66.7%), engine (1, 33.3%). There are no safety recalls listed for this model year.
What are the most common problems with the 2014 Mercedes-Benz SLK-Class?
Across 3 owner complaints filed with NHTSA, the categories mentioned most often are structure (66.7% of complaints), engine (33.3% of complaints). One complaint can name several components.
Does the 2014 Mercedes-Benz SLK-Class have any recalls?
As of October 2026, NHTSA lists no safety recalls for the 2014 Mercedes-Benz SLK-Class. Recalls can be issued at any time, so check your VIN at nhtsa.gov/recalls.
Check your own SLK-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 2014 only.