Home · 2015 Mercedes-benz Sl-class · Complaints
These are the actual owner complaints behind this car’s reliability verdict, filed with the federal government, unedited. They’re unverified reports, not confirmed defects: read them as leads for your pre-purchase inspection, not a diagnosis.
Newest first · 4 complaints
Multiple wheel rims (4) have cracked while driving under normal driving conditions. The last wheel rim crack occurred while on the highway leading to a flat tire upon arriving at destination. The rim was found cracked in two places.
NHTSA ODI 11427416
THE ENGINE HARNESS, ME CONTROL UNIT ANDCAM SENSOR FAILED CAUSING OIL TO LEAK INSIDE ENGINE AND COSTLY REPAIR. THIS IS A KNOW ISSUE ON PREVIOUS YEARS AND MODELS. AT THE TIME THE CAR ONLY HAD 50730 MILES.
NHTSA ODI 11399230
MY SL400 SEEMED TO HAVE A SLOW LEAK SINCE I BOUGHT IT, PARTICULARLY ON ONE TIRE. FINALLY WHILE OUT FOR A DRIVE THE TIRE DRAMATICALLY LOST TIRE PRESSURE AND IT LED ME TO GET SERVICE, WHERE I FOUND THAT THE RIM WAS CRACKED. I HAD THE RIM REPLACED FOR OVER USD$1000 IN OCTOBER. THEN IN DECEMBER, SAME SYMPTOM, SLOW LEAK, THEN DRAMATIC LOSS OF PRESSURE. CAR WAS TAKEN TO DEALERSHIP FOR SERVICE AND THEY FOUND THE SAME SYMPTOM, CRACKED RIM, AND INSPECTED THE OTHERS AND FOUND ANOTHER. THREE (3) CRACKED RIMS IN LESS THAN 3 MONTHS. I MAY ADD THAT THE CHANGE FROM SLOW LEAK TO DRASTIC LOSS COMES QUICKLY. I AM UNCOMFORTABLE FOR THE SAFETY OF MY VEHICLE. THE DEALER KNEW TO INSPECT THE OTHER WHEELS. EACH OF THESE RIMS COSTS MORE THAN USD$1000, AND THE DEALER TRIES TO PUSH A "TIRE & RIM WARRANTY". THE CAR HAS BEEN DRIVEN LIGHTLY BY ME AND LESS THAN 3000 MILES PER YEAR FOR THE LAST 2 YEARS. TO HAVE SUCH DRAMATIC FAILURES LEADS ME TO BELIEVE THAT THIS IS A DESIGN OR MANUFACTURING DEFICIENCY, AND CAUSE FOR SAFETY CONCERN FOR THE PUBLIC,
NHTSA ODI 11383389
CHECK ENGINE LIGHT CAME ON. MERCEDES DEALERSHIP STATED THAT THE CAM SOLENOID FAILED, WHICH CAUSED OIL TO LEAK TO OTHER COMPONENTS OF THE ENGINE THAT NEEDED TO BE REPLACED INCLUDING ENGINE WIRING HARNESS, CONTROL UNIT, SOLENOID, POSITION SENSOR, OXYGEN SENSOR, LAMBDA PROBE AND INJECTORS. CAR WAS JUST AT DEALERSHIP AT THE END OF MARCH/APRIL DUE TO MISFIRE AND CHECK ENGINE LIGHT. NO MENTION OF DAMAGE OR LEAKAGE. PREMATURE FAILURE ON PART.
NHTSA ODI 11341734
Working with the data? Download all 4 complaints as CSV · fetched from NHTSA July 14, 2026