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Electrical systemPart report

2021 Mercedes-Benz GLC 300 Electrical system Problems

Complaints
8about this part
Share
12%of 67 total for the year
Median mileage
—not reported
Trend
Not enough dataFewer than 15 complaints, too few for a reliable trend.

NHTSA recorded 8 complaints about the electrical system of the 2021 Mercedes-Benz GLC 300, 12% of the 67 complaints for this model year. 1 recall campaign on record is filed under a similar system.

Fewer than 15 complaints name this part, so treat the figures as a rough indication only.

Example complaints

Selected from NHTSA records; personal details are removed. They are consumer reports, not findings.

“I seen a recall for certain 2021 GLC 300 vehicles for moisture in right side headlamp, causing headlamp to blow (go out). This happened on my 2021 GLC 300. Same moisture issue, same year, same model, however, my vin number does not show that it has a recall. I believe this safety issue needs to be expanded to include my vehicle. Same issue, same year, same make and same model”

NHTSA complaint #11657172, filed 2025-04

“Have been getting condensate inside vehicle headlights inwhich have cause the headlight to completely not work anymore.. There is no damage to headlight which means to be cause due to a problem with the seal. Checked with local and also statewide Mercedes advisors which was told there isn’t a recall for my vehicle inwhich I looked online and found an recall for vehicles just like the one I have.. Recall number 22V261000-Recall Date 04-14-2022. I’m asking for my vehicle to be inspected and repaired free of charge . …”

NHTSA complaint #11674539, filed 2025-07

“My vehicle suddenly starting getting moisture in the passenger side head light.Many people brought this my attention.After some time of moisture the head light begin to flicker on and off while I was driving.Then it just went out and stopped working.Eventually I took it to the dealer and they informed me that my vehicle didn't have a recall for this issue.As I search the Internet I found that lots of other customers experienced this same exact issue.I called Mercedes USA and they informed me to present the issue to you all. Thank You in advance for reviewing my concern.”

NHTSA complaint #11627113, filed 2024-11

“My car was bought new in October 2021 & I began having problems after having it for 6 months & the mileage at that time was about 4000 miles - it was in April 2022 & the check engine light came on & I had a loss of power to where it slowed down & would not go any faster than about 30/35 miles an hour going on a straight road way & no faster than about 10 miles an hour going uphill. The engine sounded funny as well. It had to be towed to the dealership for repair. This incident happened again a month later & it was towed to the dealership at that time. …”

NHTSA complaint #11486730, filed 2022-09

“Mercedes App displays low battery alert. Brought to dealer who stated Mercedes told them (dealer) to inform anyone coming in with this issue to just disregard the alert in the app. Had the battery checked anyway. At the conclusion was told I had to “drive the car longer so the battery would recharge”.”

NHTSA complaint #11632268, filed 2024-12

Related recalls

Related service bulletins

Electrical system: other model years

YearComplaintsShare of year
20251275%
2024629%
20233055%
20221220%
2021812%
202069%
20191430%
20181315%
20171515%
2016118%

Other parts of the 2021 Mercedes-Benz GLC 300

Engine
30 complaintsExterior lighting
13 complaintsFuel system
12 complaintsOther or unknown
7 complaintsTransmission and drivetrain
4 complaintsVisibility (wipers, defrost, mirrors)
4 complaintsBack-over prevention (rear camera)
3 complaintsForward collision avoidance
3 complaintsBody and structure
3 complaintsLane departure
2 complaintsVehicle speed control
2 complaintsAir bags
1 complaints

← All problems reported for the 2021 Mercedes-Benz GLC 300

About this data. Data from NHTSA (ODI) complaints, recalls, TSBs and investigations, updated Oct 31, 2026. Complaints are unverified consumer reports and may be duplicated or inaccurate.

To check a specific vehicle for open recalls, use its VIN at nhtsa.gov/recalls. Methodology