There are 4 owner-reported electrical system complaints for the 2006 Mercedes-Benz SLK-Classin NHTSA's database. These are unverified consumer reports and may not reflect confirmed defects.
Headlight wires (Inside Housing) are frayed / melted. Can cause fire. I was replacing my bulb when I noticed the wires in the plug were completely stripped with no shielding. I traced it back to the connector and the wire shields were either frayed or completely gone
TL* THE CONTACT OWNS A 2006 MERCEDES-BENZ SLK280. THE CONTACT TOOK THE VEHICLE TO AN INDEPENDENT MECHANIC TO HAVE THE PASSENGER SIDE MARKER LIGHT BULB REPLACED AND WAS ADVISED THAT THE VEHICLE HAD A FAULTY HARNESS. THE MECHANIC STATED THAT THE HARNESS NEEDED TO BE REPLACED AS SOON AS POSSIBLE BECAUSE IT COULD SHORT OUT AND START AN ENGINE FIRE. THE VEHICLE WAS NOT REPAIRED. THE CONTACT STATED THAT THE VEHICLE WAS REPAIRED AT JACKIE COOPER IMPORTS (9393 S MEMORIAL DRIVE, TULSA, OKLAHOMA 74133) APPROXIMATELY A YEAR AND A HALF AGO FOR THE DRIVER'S SIDE LIGHT MARKER. THE MANUFACTURER WAS NOTIFIED OF THE FAILURE. THE APPROXIMATE FAILURE MILEAGE WAS 168,000.
Electrical system faulty. Front lowbeam headlight warning light on. Mechanic changed headlight bulb but it still did not work. After about a week the warning indicator went off and headlight worked. A few days went by and the indicator came on again. The low beam did not work. This time the left side marker lamp indicator came on and the bulb wasn't working. Before I could take it in for repair the side marker was working again. It goes off and on about every other month. Also, the indicator for one of the bulbs above my license plate goes on and off, but it says bulb malfunction. Now joining is the passenger side ABS light. Sometimes when I start the car the warning indicator on the instrument panel is illuminated but then goes off after I start the car several times, about a day or two. I never know which electrical component may not be working when I turn on the ignition switch. Sometimes no warning indicators will be displayed. The side marker lamp indicator hasn't been on in months, but 3 days ago it came on again and both low beam lamp indicators are on as well. So, right now I'm driving with my high beams on. I'm just waiting for them to work again, you never know. It's so frustrating and dangerous. I have read that this is a common issue. It needs to be looked in to.
MY CAR IS A 2006 MERCEDES BENZ SLK280. THE SRS LIGHT INDICATOR TURNED ON AND STAYED ON.. THE GARAGE SAID THE COST OF REPAIR OF THE SRS SYSTEM WOULD BE OVER $400.00. I DO NOT KNOW IF THE RESTRAINT SYSTEM / AIRBAG WILL WORK IF THERE IS AN ACCIDENT, IT MAY BE A VERY HAZARDOUS CONDITION IF THE MERCEDES IMPACT PROTECTION SYSTEM IS NOT WORKING. MANY OTHER SLK280 OWNERS HAVE ALSO COMPLAINED ABOUT THIS PROBLEM. *TR
Complaints are unverified consumer reports submitted to NHTSA. A high complaint count may reflect vehicle popularity, not defect severity. Data sourced from NHTSA public records.
Data synced from NHTSA on Apr 25, 2026