Mercedes-Benz GLC 300 headlights problems

Filed Sep 11, 2026 · Lights · GA

I own a 2021 Mercedes-Benz GLC 300. The vehicle developed moisture/condensation in the headlamp, and the affected headlamp subsequently failed. I took the vehicle to RBM of Alpharetta, an authorized Mercedes-Benz dealership. I was advised that corrosion was found in the affected headlamp and that the headlamp assembly requires replacement. On September 8, 2026, the dealership provided a repair estimate of $3,387.33. The vehicle had approximately 84,769 miles. Mercedes-Benz previously issued the federal safety agency Recall 22V‑261 / Campaign 2022050005 for certain 2021 GLC-Class vehicles because headlamp electrical connections may not have been sufficiently watertight, allowing moisture intrusion that could cause headlamp failure. My vehicle is the same year and model and is experiencing headlamp failure involving moisture and corrosion, but Mercedes-Benz states that my VIN is not included in the recall population. Mercedes-Benz Customer Care opened Case 23963515 and has declined coverage to date. I am concerned that my vehicle may be experiencing the same or a substantially similar moisture-intrusion defect as vehicles covered by Recall 22V‑261. A failed headlamp reduces nighttime visibility and presents a safety concern. I am requesting that the federal safety agency review whether similar headlamp moisture intrusion, corrosion, and failure may be occurring in additional 2021 Mercedes-Benz GLC 300 vehicles outside the original recall population.

Filed Sep 10, 2026 · Lights · FL

My vehicle is experiencing moisture intrusion caused by a defective headlight housing seal. The water intrusion has resulted in a short circuit and failure of the turn signal module within the headlamp assembly. I am aware of the federal safety agency Safety Recall 22V‑261, which addresses a substantially similar defect involving inadequate watertight sealing of the headlamp assembly that can allow moisture intrusion and lead to headlamp electrical failure. My vehicle is experiencing the same type of moisture intrusion and resulting electrical failure described in that recall. Because this failure appears consistent with the known safety-related defect identified by the federal safety agency, I am requesting that the vehicle and affected headlamp assembly be evaluated for recall-related or manufacturer-assisted repair rather than treated solely as a routine out-of-warranty component failure.

Filed Sep 4, 2026 · Electrical, Lights · OH

My 2021 Mercedes-Benz GLC 300 is not currently included in the federal safety agency Recall 22V‑261 / Mercedes-Benz Campaign 2022050005, but my vehicle is experiencing substantially the same defect described in that recall. Moisture/water entered the left headlamp assembly/electrical connection, resulting in condensation/water accumulation and damage/corrosion around the headlamp electrical module/connector. The headlamp system subsequently malfunctioned. Recall 22V‑261 describes a condition where the headlamp electrical connection may not be watertight, allowing moisture ingress and potentially causing headlamp failure. My vehicle appears to exhibit the same condition even though my VIN is excluded from the recall population. I am requesting that the federal safety agency review whether the affected population for Recall 22V‑261 may need to be expanded.

Filed Jul 3, 2026 · Brakes, Electrical · IN

While driving down a busy neighborhood street 2 lanes with cars on both sides making it a 1 lane road pulled over to the side a little to let cars pass. All of a sudden ALL electrical and engine stopped and turned off. Only thing that was powered was instrument cluster with multiple warnings like SRS Malfunction, Steering Malfunction, SOS Inoperative, Parking Brake and more. We believe the car had also shifted to park on its own. No power to anything not even hazard lights. Nothing electrical had any sort of power. Could not even turn car off completely could not get the instrument cluster to turn off with ignition button. When I say everything electrical had no power I mean everything except instrument cluster. Hazard lights power locks, lights of any kind, ignition switch, gear selector, windows, sos feature, nothing had power. I could not imagine having this issue driving on the interstate and having the car completely loose ALL electrical power and what could happen to specially with a SRS malfunction and issue with steering. Had to have a wrecker come with wheel dollys because car could not be put in neutral and towed to Mercedes dealer. Upon their inspection they found the Circuit 30T relay to be stuck in the open position which killed power to everything so the technician replaced the engine compartment pre-fuse panel. It is such a unsafe and very hazardous issue to have a relay failure to where all power is lost especially if you were driving on interstate especially at night with traffic to loose everything electrical even hazard lights and headlights, SRS maltunction, Steering. Mercedes needs to figure this very unsafe issue out.

Filed Mar 13, 2026 · Lights · CA

Headlight is defective and is filled with condensation which has caused the entire light to fail. The problem has been confirmed by a independent service center. The light has not been inspected by a manufacturer however the manufacturer was contacted and denied that a recall exists however other purchasers have reported the same issue. There have been no apparent issues prior to this problem.

Filed Feb 19, 2026 · Lights · FL

There was a recall on headlight leaking and this happened to my left headlight no damage but leaking and this caused headlight to not work

Filed Jan 15, 2026 · Lights · CA

Water condensation within the driver side headlight which caused the complete headlight unit, control unit, and module to fail. This is a huge safety issue due to unable to operate vehicle safely during the when it comes to making left turns due to no signal indicator and a safety issue/hazard when driving at night. The issue has been inspected with a local dealer and with corporate being aware of the manufacturer defect. There were no indicators nor warning lamps prior to this issue.

Filed Jan 13, 2026 · Lights · 41,000 miles · CA

The contact owns a 2021 Mercedes-Benz GLC300. The contact stated that the passenger’s side headlight was developing fog, causing the light to be dim. The vehicle was taken to the dealer, who diagnosed the vehicle and determined that the headlight needed to be replaced. The vehicle was not repaired. The contact learned of the federal safety agency Campaign Number: 22V261000 (Exterior Lighting); however, the VIN was not included. The manufacturer was informed of the failure and confirmed that the VIN was not included in the recall. The manufacturer referred the contact to the federal safety agency Hotline to report the failure. The failure mileage was 41,000.

Filed Dec 19, 2025 · CA

The front main light on the driver side stopped working after a rain and it continued getting moister in the head lamp every night until a few days ago and as a result the head light assembly does not work at all ,the same thing is happening on the passenger side front head light assembly except it is still working .research showed that this has been a problem on similar Mercedes Benz cars and considering that the car has not had any accidents to possibly causing this it was concluded that this should have been part of the recalls .car is not operatable and i reached out to Mercedes Benz and they acted like I am out of my mind and it is passed the express warranties with car having 69000 miles. I tried explaining to them about the implied warranty and the safety problem and they continued with the same none sense. at this point The MBZ dealers want over $ 6000.00 to replace the part and I am not able to operate car.what can you do for me and others effected.

Filed Oct 14, 2025 · Lights · FL

Problem (repeat failure / prior warranty replacement): This vehicle has a recurring headlamp defect involving moisture ingress into the headlamp housing/connectors, causing electrical shorting and warning messages, with risk of headlight failure. Mercedes-Benz replaced this same headlamp under warranty in 2021 for the identical issue (moisture/shorting). The defect has recurred on the same vehicle.Recent verification: On Oct 13, 2025, the dealer (Mercedes-Benz of North Palm Beach) observed visible condensation/fogging in the lamp and confirmed it matches the prior failure that was repaired under warranty. Pattern affecting other owners: There are multiple consumer complaints in the federal safety agency’s database describing condensation, moisture intrusion, shorting, and headlamp malfunctions on GLC vehicles, including the 2020 model year. This indicates the issue is not isolated. Related recalls / known condition: the federal safety agency Recall 22V261 (GLC) identifies headlamp moisture/connector sealing problems leading to lighting failure. While my VIN is not currently included, the failure mechanism is the same: moisture → short → potential loss of headlight illumination. There are also GLC lighting recalls addressing exterior lighting malfunctions, underscoring that lighting faults on this platform are safety-relevant. Safety risk: Headlamp moisture/shorting can disable exterior lighting, reduce nighttime visibility, and increase crash risk. This is a repeat, safety-related defect previously repaired by Mercedes-Benz that has returned. Requested action: Please investigate this headlamp moisture/shorting defect on the 2020 GLC as a recurring safety problem, consider expanding applicable recall/remedy coverage, and direct the manufacturer to provide a durable fix and appropriate remedy for affected vehicles.