MERCEDES-BENZ Complaints

Active distance assist inoperable, active brake assist functions limited, adaptive cruise control not working, lane keeping assist glitching. I was driving the vehicle home after purchase and the lane keeping assist was glitching, it was actively pulling the wheel to the left, like I was over the fog line (I wasn’t) and it was hard braking, Making driving very unsafe. I slowed down and got off at the next exit at a gas station to figure out what was happening. I put the vehicle in park and consulted the manual. I tried to turn off and back on all the systems, through the menu, noting worked. I shut the vehicle off and cleaned the areas around the sensors and the windshield, like the manual suggests. I went in to start the vehicle, and the message “service required do not shift gears” came on the dash. It was stuck in Park. I tried to get a tow truck, but had to wait 4 days, in a gas station parking lot before a tow company with a big enough truck, and skids, (because it was stuck in park) could come on Wednesday May 27. I got it towed to a repair shop. It shows the Code P179A77 direct select redundancy malfunction, they couldn’t fix it. It needs Xentry level diagnostics. The intelligent Servo Module, or direct select module failed/won’t shift from park. There is a recall that wasn’t fixed, I got a carfax from the dealer saying that there were NO active recalls. The recall is to update an all service modules. Yes it’s available for inspection, but it’s stuck in Park at the repair shop that can’t fix it in Riverton Wyoming. I called Mercedes Benz, and tried to get help because the active recall should fix these problems. They would not help. They will not sell me the part and code it to the vehicle because it’s part of their theft deterrent system. This has cost me thousands in flights, hotels, and countless hours trying to figure it out. The nearest Mercedes Benz dealership is 270 miles away, and towing will break me.

2026 Mercedes-Benz GLE 580 | ~2,800 miles | Mercedes-Benz of McKinney, McKinney, TX | No warning lamps preceded any failure. ISSUE 1 — Instrument cluster blacks out while driving The speedometer and tachometer display goes completely black without warning at normal road speeds. The only remedy is stopping, shutting off the engine, waiting 10 minutes, and rebooting. Loss of speed and warning indicator visibility while driving creates immediate safety risk. Dealer is aware; no repair order on file. ISSUE 2 — Auto stop/start shuts engine off while coasting The stop/start system incorrectly kills the engine at low speed without driver input. On restart, the engine hesitates and idles roughly. Unexpected engine shutdown reduces power steering and braking assist, creating a hazard in traffic. No warning precedes the event. Dealer is aware; no repair order on file. ISSUE 3 — Transmission valve body failure; hard downshift persists after repair Abnormal transmission behavior required three dealer visits to diagnose. The valve body was replaced. The vehicle still exhibits a hard 5-to-4 downshift after repair. Abrupt downshifts during deceleration reduce predictable vehicle control. Repair orders are on file at Mercedes-Benz of McKinney. Issue remains unresolved. Vehicle is available for inspection upon request and will be going back in to the dealer for repair services by 6/25/2026

The front vehicle hood keep saying it open but is lock keep getting a message saying is open I am afraid is might come out lock and cause me to an accident

I am filing a complaint regarding my 2018 Mercedes-Benz GLA 250. My vehicle recently triggered a check engine light and was diagnosed by an independent mechanic with code P052E, related to the positive crankcase ventilation regulator valve / crankcase ventilation system. My mechanic advised that this issue appears to be similar to a known Mercedes-Benz issue affecting other model years and/or related Mercedes models. Mercedes-Benz has issued an emissions extended warranty/service coverage for a similar crankcase ventilation / intake line assembly issue on other vehicles, including fault code P052E71. However, my vehicle does not appear to be included despite having the same or very similar failure code and system issue. I am concerned that this may be a broader defect affecting additional Mercedes vehicles beyond the models currently covered. The issue involves the crankcase ventilation/PCV system and may require repair of related intake line, valve cover, oil separator, or ventilation valve components. I believe this should be reviewed because owners of vehicles with the same failure pattern may be responsible for costly repairs even though the issue appears similar to one Mercedes has already acknowledged on other models. I am requesting that NHTSA review whether 2018 Mercedes-Benz GLA 250 vehicles should be included in any related recall, defect investigation, emissions warranty extension, or service campaign related to code P052E / P052E71 and the crankcase ventilation regulator valve system.

The contact owns a 2012 Mercedes-Benz E350. The contact stated that while driving at an undisclosed speed, there was an abnormal odor coming from the inside of the vehicle. No warning lights were illuminated. The vehicle was taken to an independent mechanic, where it was diagnosed with a fuel leak. The vehicle was not repaired. The contact researched and was made aware of NHTSA Campaign Number: 12V557000 (Fuel System, Gasoline); however, the VIN was not included in the recall. A dealer was contacted; however, the vehicle was not yet diagnosed by the dealer. The manufacturer was notified of the failure. The failure mileage was approximately 70,000.

Rear view camera fails to initiate when placed in reverse. Screen doesn’t even try to switch to camera view. Exact same issue found in same make and model recalled with different vins. For some reason this one isn’t included in the recall. Car only has about 58,000 miles. Started around 56,000 miles. Note that camera even folds out of lift gate like normal when placed in park.

My car has only 28,392 miles on it, but the yellow check engine light recently came on due to a faulty oil pump solenoid. I took it back to the dealership, and the repair cost was a staggering $7,000; they told me this is a common issue with this Mercedes engine. If this fails to function, engine noise will increase while driving and fuel consumption will rise; there may also be other unknown risks. The issue stems from a manufacturing defect that causes the malfunction indicator light to remain illuminated, preventing the vehicle from passing the annual emissions inspection and rendering it ineligible for legal road use; furthermore, the repair entails removing the front subframe and oil pan, resulting in unreasonably high repair costs.

LEMON LAW NOTICE: [XXX]– [2023 CPO Mercedes EQE350+] – Repeated Defects- Vehicle Safety feautures non functional I request that the TxDMV Enforcement Division investigate the deceptive trade and inspection practices of Mercedes-Benz of North Houston, and compel the dealership to cover the full physical repair and component costs required to bring this vehicle back into manufacturer safety compliance at my local servicing facility. I hold formal video diagnostic evidence provided by a certified technician confirming these facts and will provide it immediately upon request by an investigator. To: AutoNation Corporate Customer Care / Executive Escalations From: [XXX] Date: June 20, 2026 Subject: Escalation: Misrepresentation and Mandatory CPO Inspection Failure – Mercedes-Benz of North Houston Vehicle & Purchase Details: Vehicle: 2023 Mercedes-Benz EQE 350+ VIN: [XXX] Purchase Date: [XXX] Selling Dealership: Mercedes-Benz of North Houston (An AutoNation Dealership) Servicing Dealership: Mercedes-Benz of West Houston Statement of Issue I am writing to formally escalate a serious matter regarding a breach of the Mercedes-Benz Certified Pre-Owned (CPO) standards and a misrepresentation of vehicle condition by Mercedes-Benz of North Houston. I am seeking corporate intervention to resolve a high-cost repair stemming entirely from an undisclosed, out-of-specification pre-existing condition present at the time of sale. Chronology of Events [XXX] (Purchase & Test Drive): I purchased the vehicle as a Certified Pre-Owned unit from Mercedes-Benz of North Houston. During the initial test drive, I explicitly noted and pointed out an active issue with the radar/sensor system to the sales team. Delayed Delivery: Due to this sensor issue, the dealership delayed delivery of the vehicle for approximately 2 to 3 weeks to allegedly resolve the problem. I took delivery in December 2025 once the sensors appeared to be functi INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

The anti whip lash prevention malfunctioned and the headrest was launched forwards

The panoramic sunroof glass on my 2024 Mercedes-Benz GLB suddenly shattered while I was driving on Interstate 20. The failure occurred without any observed impact from another vehicle, object, or roadway debris. The damaged sunroof and vehicle are available for inspection upon request.The failure occurred unexpectedly while traveling at highway speed and was accompanied by a loud explosion-like sound that resembled a gunshot. The sudden noise startled me and could have caused a loss of vehicle control. Additionally, shattered glass posed a potential risk of injury to vehicle occupants and could have created a hazard for other motorists. The incident was reported to an authorized Mercedes-Benz dealership. The dealership confirmed that the sunroof glass had shattered. However, I do not agree with the conclusion that roadway debris caused the failure because I did not observe any object strike the vehicle and no supporting evidence has been provided to me. The vehicle has been inspected by an authorized Mercedes-Benz dealership and the incident has been reported to Mercedes-Benz Customer Assistance.No police report was filed because there was no collision or criminal activity involved. No warning lamps, messages, alerts, or other symptoms appeared before the failure. The sunroof functioned normally prior to the incident. The failure occurred suddenly and without warning while the vehicle was being driven. I am requesting a thorough review of this incident, including an evaluation of whether the sunroof failure may have resulted from a manufacturing defect, thermal stress, or another non-impact-related cause. I believe the circumstances surrounding this event warrant further investigation because the sudden failure created a significant safety concern while operating the vehicle at highway speeds. I am seeking a fair resolution and a detailed explanation of the basis for the determination that roadway debris caused the damage