1999 Mercedes-Benz SLK

Typical pattern

6.1% of complaints about the 1999 Mercedes-Benz SLK came in the first year, which is unremarkable for a 1999 vehicle — around the middle of the 201 model-years on record. The median complaint arrives at 7.5 yr in service. The most-reported system is visibility (23 complaints), typically at 9.8 yr or about 62,010 miles.

Covers 1 variant: SLK230 (77)

Complaints: 82
Median age at failure: 7.5 yr
Median mileage: 70,000 n=51
Crash / fire / tow: 8.5% of reports
Safety recalls: 0

In owners’ own words

Exterior lighting mileage not reported 8.3 yr in service

TL* - THE CONTACT RECEIVED A RECALL LETTER CAMPAIGN # 05V505000 ON 01/09/07 FOR THE EXTERIOR LIGHTS ON HIS 1999 MERCEDES SLK. THE DEALERSHIP, R & H MERCEDES OWENS MILL, MARYLAND TOLD THE CONTACT THAT THEY WOULD NOT PERFORM THE RECAL REPAIR BECAUSE THE BRAKE LIGHT WAS PRESENTLY WORKING.

Exterior lighting 51,000 mi 9.0 yr in service

1998 MERCEDES-BENZ SLK, BOTH REAR BREAK LIGHTS BURNED OUT, PLASTIC (BLUE) LIGHT BLUB HOLDERS ARE FUSED TO THE ASSEMBLY DUE TO EXTREME OVERHEATING CONDITION. CANNOT BE REMOVED BY HAND. JB

Exterior lighting mileage not reported 7.3 yr in service

THIS IS IN REGARDS TO RECALL NUMBER 05V505 FOR THE DRIVER SIDE REAR BRAKE LIGHT. THIS RECALL OCCURRED IN 2006 AND THE LIGHT WAS FIXED. HOWEVER, IT HAS FAILED AGAIN AND HAS THE EXACT SAME PROBLEM, THE SOCKED HAS GOTTEN HOT AND MELTED/DEFORMED THE PLASTIC SOCKET. I DON'T KNOW IF THE BULB WAS REPLACED ONLY BUT TO ME IT APPEARS NOTHING HAS BEEN DONE TO REPAIR THIS ISSUE ON THIS CAR. *TR

Visibility 70,000 mi 13.0 yr in service

THE MIRROR IS SELF-DIMMING USING A LIGHT-SENSITIVE LIQUID BEHIND THE MIRROR. THE LIQUID LEAKED OUT OF THE MIRROR AND CREATED ACID STAINS ON THE CENTER CONSOLE. THE MIRROR IS NOW BLURRY AND SHOWS GHOST IMAGES OF ANYTHING BEHIND. IT ALSO NO LONGER AUTO-DIMS WHEN BRIGHT HEADLIGHTS APPROACH FROM BEHIND AND THERE IS NO LEVER FOR THE DRIVER TO USE TO MANUALLY DIM IT. THE EASIEST THING IS TO JUST TURN IT AWAY BUT THAT CREATES A SAFETY HAZARD. I ASKED MERCEDES-BENZ CORPORATE TO HELP IN THIS MATTER BUT THEY REFUSED SAYING THE PART IS OUT OF WARRANTY AND THERE IS NO RECALL IN EFFECT. *TR

Other SLK model years

How to read this

This is what owners reported, not a reliability rating. People file with NHTSA about alarming failures, not routine ones, and complaint volume tracks how many cars were sold.
Failure ages come from the incident date on each complaint, populated on about 83% of records. Mileage is shown where reported — NHTSA’s 2021 system change cut mileage capture to roughly 15%, so it thins out sharply after MY2020.
Every rank compares this vehicle only against others of the same model year. A 2025 car has not had time to accumulate five-year failures, so comparing early-failure share across years is meaningless.
Fourteen make-months distorted by media storms and mass recalls — Toyota in February 2010 ran 11× normal volume across 33 models — are excluded.
Recalls are manufacturer actions and authoritative; complaints are not. A recall listed here may already have been performed on any individual car. Check a specific VIN at nhtsa.gov/recalls.

1999 Mercedes-Benz SLK

When each system is reported — middle 50% of complaints

In owners’ own words

Other SLK model years

How to read this