Jan 26, 2026Fuel system
The Gas Door did not open in order to pump gasoline. There is no mechanical device for the driver, passenger, owner of the vehicle to manually open the gas door from the inside. There was no electronic warning within the Mercedes Benz to alert driver about malfunction of gas door not working. Driver took vehicle to local Firestone mechanic who said the "gas door actuator" needed to be replaced. Accordingly, vehicle with the remaining gasoline was taken to local Mercedes Dealer who after the vehicle being looked at, "confirmed gas door to not opening due to internal mechanical fault" and replaced with new gas door actuator at a cost of $820.28. Vehicle owner mentioned to service rep, that he lives from parents about 150 miles away and had the vehicle owner stopped at gas station in between, the vehicle owner would have been stranded without any access to a dealer to fix this critical safety issue. Vehicle owner then advised service rep this issue should have been elevated as critical safety recall issue and that a complaint would be filed with NHTSA. Any vehicle owner, their family if being transported in a deserted place hoping to go to the next gas station for pumping gas would have faced a severe danger to their self and their families. Vehicle owner has sent a detailed letter to Mercedes Benz corporate office in USA detailing the incident and a copy of the letter will be attached as an attachment if it is permitted in this complaint. Requesting a recall of this issue with an order for reimbursement of service charges paid by vehicle owners to fix this "malfunction of gas door". There are multiple complaints to this effect on various message boards regarding the occurrences of "gas door not opening". This also needs to be looked at.
NHTSA ODI 11713295
Aug 2, 2025Speed controlEngineFuel system
When coming to a full stop at a red light (or any need to idle at a stop), the car frequently begins to hesitate as if it is about to cut off. I assume it has something to do with the ‘fuel saving feature’ which comes on in the form of a green symbol in the lower left of the odometer display (the engine is still running the AC) . When you start to drive again the car always jerks before moving , on at least 3 occasions it has actually cut off completely and must be restarted (everything goes off) - it is big problem, especially in heavy traffic (horns blaring & angry drivers are encountered) I almost had a car hit me from behind; my car had jerked slightly when I began to accelerate and then shut off completely. It is definitely a dangerous defect. The Dealership emphasizes 93 Octane gas or higher to help with this issue- but I Always use the highest Octane gas I can find ! It has happened VERY often - I dread stopping at red lights and stop signs, one day it will cause an accident.
NHTSA ODI 11677929
Sep 12, 2023EngineFuel system
I purchased this car approx 3 months after real issues began. My car would have issues idling where it would sometimes turn off at stop lights and require multiple reignition attempts before proceeding. This would also happen when the auto-start feature (anti-idle/gas saving) was engaged (which is the default in the system) and this posed major safety concerns. The unstable idling of the car would result in an initial acceleration after being stopped, shortly followed by the engine dying. There were multiple times I was at an intersection yielding before turning where this happened and it resulted in my being in the path of oncoming traffic without the ability to accelerate until the car restarted. I contacted my local Mercedes dealer who acted like this wasn't a big deal, but it is related to a known issue with a faulty cylinder head. They covered the repair under the manufacturer warranty, but told me to keep driving my car and promised it was safe until they could get the part in (because the didn't have a loaner car to provide). I found this very troubling. In conversations throughout the repair being completed, the dealer admitted that they know the part that was used for the year and model is bad, but they didn't want to do a recall and would wait for issues to come up. This is unacceptable because this absolutely is a safety concern as demonstrated by the example I shared. They should be required to do a full recall to address the safety concerns and I believe not disclosing this information was unfair to me as a consumer who did not have the information I needed to be informed on the reliability of this vehicle prior to purchase.
NHTSA ODI 11544109