2017 Mercedes-Benz C-Class Electrical System Problems

I am reporting a serious vehicle safety hazard caused by improper and unsafe repair work performed by USA Platinum Motor, located at 1221 California Lane #126B, Arlington, TX. I brought my 2017 Mercedes-Benz C300 in for a cold start rattle with no warning lights or prior issues. The shop diagnosed a loose timing chain and I authorized the repair. After the repairs, the vehicle was returned with critical safety defects, including a loose fuel pump, unsecured fuel line, missing bolts, and improperly reassembled engine components. Shortly after pickup, the car experienced loss of acceleration on the interstate, a strong odor of fuel, and a sudden loss of power, creating a dangerous and life-threatening situation. The vehicle had to be towed back to the shop. The manager, who is not a certified mechanic, admitted he personally “fixed” the issue by tightening the fuel pump himself. A Mercedes-Benz diagnostic inspection later confirmed multiple severe assembly errors, including missing fasteners, unsecured oil cooler, disconnected vent lines, and other safety-related defects in the fuel and cooling systems. These unsafe and negligent repairs created an extreme fire hazard, engine instability, and risk of sudden failure while driving. I am requesting a formal NHTSA investigation into this matter to ensure vehicle safety compliance and to prevent similar incidents affecting other consumers.

See attached document for complaint.

The sunroof is very glitchy and this is common in all Benz I have had a few different Benz and they all eventually have this same issue with their panoramic sunroof. Sometimes it opens half way life one side is up and the other side is closed and other times it will open fully but not close and other times it won’t open at all. This is a common problem that many Benz owners have stated this in the Benz forums all over. This is a safety issue due to unexpected weather conditions if it rains and it’s stuck inside gets damage and owners get wet which is also a distraction and may cause accidents. Please investigate this issue thoroughly. Their sunroofs should be recalled and extended warranties placed on them automatically by Mercedes Benz due to this being a very common issue in all model’s panorama sunroofs particularly C300s year 2017 thank you for looking into this matter.

ESP control unit software Recall 2016090002 Recall 2017110002 Recall 2020080016 And my car shows there’s cero recall active but is giving me problem showing code: U0121 u1110 U0122 B227d U0423 B227d

When i scan my vehicle there are Mercedes Benz fault codes pertaining to the electrical system but also recalls that haven’t been done but when looking Mercedes Benz web site and NHTSA WEBSITE these are aren’t showing up as my particular chassis being included as part of the campaign

Check engine light came up for a PCV valve error. Car was driving fine with no recent changes and the repair is going to cost over 2000$.

Hey good morning. There’s been a been a system failure. P052E Positive Crankcase Ventilation Regulator Valve Performance. Warning message I got was the engine light showed

I was reversing my vehicle when I heard a snap, and the inside dash panel warning sign came on…later I google it and found out it has happened to many other people. the clock spring behind the steering wheel snapped and airbags warning signs came on with possibility of deploying at any moment.

Light came on tonight and stayed on, Collinsion prevention assist inoperable. Car has been involved in any collision for this system to quit out of the blue

The contact owns a 2017 Mercedes-Benz C300. The contact received notification of NHTSA campaign number: 21V058000 (Communication, Electrical System) however, the part to do the recall repair was not yet available. The contact stated that the manufacturer had exceeded a reasonable amount of time for the recall repair. The local dealer claimed that the manufacturer was responsible for the recall repair. The manufacturer was not made aware of the issue. The contact had not experienced a failure. Parts distribution disconnect.

TL* THE CONTACT OWNED A 2017 MERCEDES-BENZ C300C. THE CONTACT STATED THAT WHILE THE VEHICLE WAS PARKED, THEY WERE INFORMED THAT THEIR VEHICLE WAS ON FIRE. THE VEHICLE'S CONSOLE HAD CAUGHT ON FIRE. THE CONTACT STATED THE FIRE DEPARTMENT HAD PUT OUT THE FIRE. THE VEHICLE WAS DEEMED TOTALED DUE TO THE ENTIRE INSIDE BEING COMPLETELY BURNED. THERE WERE NO INJURIES. A REPORT WAS FILED BY THE FIRE DEPARTMENT STATING THAT THE FIRE WAS CAUSED BY ELECTRICAL FAILURES. THE DEALER (MERCEDES-BENZ OF STEVENS CREEK 4500 STEVENS CREEK BLVD, SAN JOSE, CA 95129; (408) 641-4610) WAS MADE AWARE OF THE FAILURE AND INFORMED THE CONTACT THAT THEIR VEHICLE WAS NOT INCLUDED IN NHTSA CAMPAIGN NUMBER: 17V114000 (ELECTRICAL SYSTEM, ENGINE AND ENGINE COOLING). THE CONTACT STATED THAT APPROXIMATELY, TWO MONTHS AGO A FUSE LINE UNDERNEATH THE FRONT PASSENGER SEAT HAD FAILED AND NEEDED TO BE REPLACED. THE VEHICLE WAS REPAIRED AT THE DEALER MENTIONED ABOVE. THE MANUFACTURER WAS MADE AWARE OF THE FAILURE AND A CASE WAS OPENED REGARDING THE MATTER. THE APPROXIMATE FAILURE MILEAGE WAS 53,000.

PISTON 1 CRACKED AT 48,000 MILES. MB TOLD OWNER THAT THE ENGINE HAD TO BE REPLACED BUT WHEN FINDING OUT THAT THE WARRANTY WAS UP AT 50,000 THEY REPLACED THE PISTON INSTEAD. CAR IS STILL SHAKING AT IDLE AND ROUGH RIDE. ENGINE SHAKES AND JERKS.

THE 2017 MERCEDES-BENZ C300 VEHICLE SUFFERED A COMPLETE LOSS OF POWER/ELECTRICS WHILE IN MOTION AT SPEED AND IN TRAFFIC, CAUSING THE VEHICLE TO UNEXPECTEDLY STOP ON TWO SEPARATE OCCASIONS. THE LOSS OF ALL ELECTRICAL SUPPLY LEAVES THE VEHICLE IMMOBILE, WITHOUT WARNING INDICATORS AND CANNOT BE MOVED. THE FIRST INCIDENT WAS AROUND 5PM IN A BUSY ROAD JUNCTION IN THE DARK, WITH LIMITED LIGHTING. AS THE VEHICLE IS BLACK COLORED IT IT IS DIFFICULT TO SEE IN THESE CIRCUMSTANCES. THE SECOND INCIDENT WAS AT ANOTHER BUSY ROAD JUNCTION IN HEAVY TRAFFIC, AT MIDDAY ON A SATURDAY. ON BOTH OCCASIONS THE POLICE HAD TO ATTEND AS THE IMMOBILIZED VEHICLE POSED A SERIOUS HAZARD WITH A RISK OF CAUSING A COLLISION TO OTHER ROAD USERS. THE APPROXIMATE TIMES TO GET THE VEHICLE REMOVED FROM THE ROAD IN THESE TWO INCIDENTS WERE BETWEEN 45 - 60 MINUTES. THE PERIOD BETWEEN THE TWO INCIDENTS WAS 11 DAYS. THE DAY FOLLOWING THEN FIRST INCIDENT, THE VEHICLE WAS INSPECTED BY A MERCEDES DEALERSHIP, WHO HAD THE VEHICLE IN THEIR POSSESSION FOR FIVE DAYS. INITIALLY THEY STATED THAT THEY HAD NOT FOUND A CAUSE FOR THE LOSS OF ALL ELECTRICAL POWER IN THE VEHICLE. SUBSEQUENTLY WHEN PRESSED ON THE MATTER, THEY STATED THE CAUSE WAS A CONNECTION PROBLEM TO THE POSITIVE TERMINAL ON THE BATTERY. IN GOOD FAITH THE VEHICLE WAS COLLECTED BY ME AND DRIVEN WITHOUT ANY APPARENT PROBLEM FOR FOUR DAYS, PRIOR TO THE SECOND INCIDENT. THE MILEAGE DRIVEN IN THAT PERIOD WAS LESS THAN 100 MILES IN TOTAL. THIS VEHICLE POSES A SERIOUS RISK TO THE DRIVER, PASSENGERS AND OTHER ROAD USERS.

TL* THE CONTACT OWNS A 2017 MERCEDES-BENZ C300. WHEN THE CONTACT STARTED THE VEHICLE WITH THE MOBILE APP, SHE NOTICED A FUEL ODOR EMITTING FROM THE VEHICLE. WHEN THE VEHICLE WAS STARTED MANUALLY, THE ODOR WAS NOT PRESENT. THE CONTACT TOOK THE VEHICLE TO PARK PLACE MOTORCARS DALLAS (LOCATED AT 6113 LEMMON AVE, DALLAS, TX 75209, 877-475-5033) WHERE IT WAS DIAGNOSED THAT THE FUEL HOSE WAS LEAKING AND NEEDED TO BE REPLACED. THE VEHICLE WAS REPAIRED. THE MANUFACTURER WAS NOT MADE AWARE OF THE FAILURE. THE APPROXIMATE FAILURE MILEAGE WAS 55,000.

SINCE I BOUGHT IN FEBRUARY 2017 BRAND NEW 2017 MERCEDES BENZ C300 CONVERTIBLE IN ONE YEAR OF OWNERSHIP I HAD TO BRING MY CAR SEVERAL TIMES FOR SERVICES LIKE, THE CONVERTIBLE TOP WOULD NOT WORK, THE MIRRORS WOULD NOT FOLD, THE STEERING WHEEL WOULD NOT ADJUST, ELECTRONICAL ISSUES LIKE CONNECTING MY CELL PHONE TO THE CAR. ( I HAD THE TOP GOT REPLACED ONLY AFTER COUPLE OF MONTHS AFTER I PURCHASED THE CAR.) TODAY APRIL 27 2018 I COULD NOT START THE CAR IN THE MORNING TO GO TO WORK, THE DISPLAY WAS SHOWING THE KEY IS NOT DETECTED( HAD TO EXIT THE CAR COUPLE OF TIMES, WITH THE KEY AND TRY AGAIN TO START THE CAR UNTIL IT FINALLY WORKED).HAD MY TOP OPEN WHILE WAS DRIVING TO WORK AND ONCE PARKED THE TOP WOULD NOT CLOSE, AND AGAIN HAD TO EXIT THE CAR LOCK UNLOCK AN TRY AGAIN COUPLE OF TIMES BEFORE IF FINALLY CLOSED. I DID RECEIVE A LETTER SAYING THAT THE CAR WAS DEFEFECTED, AND THAT THE AIRBAG ON THE DRIVERS SEET MAY NOT WORK, I'LL ATTACH THE LETTER ( BROUGHT FOR SERVICES) BUT IT'S SEEMS THAT THEY DIDN'T FIX THE PROBLEM. ALSO THE TIRE PRESSURE EVERY COUPLE OF WEEKS IT'S LOW, AND THE DISPLAY WOULD SHOW SOMETIMES THAT THE SEET IS NOT FIRM OR STEADY. I BOUGHT A BRAND NEW CAR TO FEEL SAFE AND DO NOT FEEL THAT WAY.

THE WIRES TO THE OUTSIDE LIGHT FIXTURES ARE MELTING. THE EXTERIOR LIGHT BULBS ARE MELTING INTO THE SOCKETS AND THE LIGHT ASSEMBLY MUST BE REPLACED IN THEIR ENTIRETY. THIS OCCURRED MULTIPLE TIMES ON 3 DIFFERENT LIGHT ASSEMBLIES: SPRING 2013, SPRING 2016 AND NOVEMBER 2017.

TAKATA RECALL SEATBELT ISSUES WARRANTY ITEMS /ELECTRICAL NO RESPONSE FROM DEALER AFTER REPEATED EMAILS

TL* TAKATA RECALL. THE CONTACT OWNS A 2017 MERCEDES-BENZ C300. THE CONTACT STATED THAT THERE WERE THREE RECALLS ON THE VEHICLE REGARDING THE AIR BAGS AND ELECTRICAL SYSTEM. THE VEHICLE WAS REMEDIED FOR AN AIR BAG RECALL; HOWEVER, THE PARTS HAD NOT BEEN AVAILABLE WITHIN A REASONABLE TIME FRAME. THE DEALER (MERCEDES-BENZ OF WEST HOUSTON, 1025 HWY 6, HOUSTON, TX 77079, (281) 492-5800) WAS UNABLE TO DETERMINE WHEN THE PARTS WOULD BE SUPPLIED FOR THE OTHER TWO RECALLS. THE MANUFACTURER WAS CONTACTED. THE NHTSA CAMPAIGN INFORMATION. THE CONTACT HAD NOT EXPERIENCED A FAILURE.

TL* THE CONTACT OWNS A 2017 MERCEDES-BENZ C300A. THE CONTACT RECEIVED NOTIFICATION OF NHTSA CAMPAIGN NUMBER: 174V114000 (ELECTRICAL SYSTEM, ENGINE, AND ENGINE COOLING); HOWEVER, THE PARTS TO DO THE REPAIR WERE UNAVAILABLE. THE CONTACT STATED THAT THE MANUFACTURER EXCEEDED A REASONABLE AMOUNT OF TIME FOR THE RECALL REPAIR. THE CONTACT CALLED MERCEDES-BENZ OF SAN ANTONIO (9600 SAN PEDRO AVE, SAN ANTONIO, TX 78216 (210) 920-3235) AND WAS INFORMED THAT PARTS WERE NOT AVAILABLE. THE MANUFACTURER WAS NOT MADE AWARE OF THE ISSUE. THE CONTACT HAD NOT EXPERIENCED A FAILURE. VIN TOOL CONFIRMS PARTS NOT AVAILABLE.

TL* THE CONTACT OWNS A 2017 MERCEDES-BENZ C300. THE CONTACT RECEIVED NOTIFICATION OF NHTSA CAMPAIGN NUMBER: 17V114000 (ENGINE AND ENGINE COOLING, ELECTRICAL SYSTEM). THE PART TO DO THE RECALL REPAIR WAS UNAVAILABLE. THE CONTACT STATED THAT THE MANUFACTURER EXCEEDED A REASONABLE AMOUNT OF TIME FOR THE RECALL REPAIR. THE DEALER WAS NOT CONTACTED AND THE MANUFACTURER WAS NOT NOTIFIED. THE CONTACT HAD NOT EXPERIENCED A FAILURE. VIN TOOL CONFIRMS PARTS NOT AVAILABLE.