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Electrical systemPart report

2023 Mercedes-Benz GLC 300 Electrical system Problems

Complaints
30about this part
Share
55%of 55 total for the year
Median mileage
8,500miles
Trend
Too newThis model year is less than 4 years old, so a trend is not meaningful yet.

NHTSA recorded 30 complaints about the electrical system of the 2023 Mercedes-Benz GLC 300, 55% of the 55 complaints for this model year. Where a mileage was given, the median is 8,500 miles. 2 of these say a crash was involved, according to the filers. 2 recall campaigns on record are filed under a similar system.

Example complaints

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

“When starting the vehicle, all the lights and alarms have come on and vehicle is not drivable. This has happened 4 times. 3/4 times the vehicle has started after an hour or two. One time I have had to have it towed in. I bought this car on April 27th. First time this happened was 5/29. I have been without the use of this car for 28 days today. The service manager called today and Mercedes is trying to fix the problem, they say it is happening to many people.”

NHTSA complaint #11525409, filed 2023-06

“There are two issues 1) Unsure of the exact date, but about a year or two ago we were driving our car and the car's automatic break system went into effect on a typically busy, 3 lane road despite there not being any cars in front of our vehicle. We took it into the dealership, who confirmed the issue and told us that sometimes the automatic brake mis-identifies the metal plates in the roads to be vehicles. Had there been a car driving behind us at the time this was happening, it could have been a major accident as the speed limit on that road was 45mph. …”

NHTSA complaint #11725254, filed 2026-03

“I purchased a brand new GLC 300 on May 25, 2023. By June 2, 2023 I was already stranded due to a 12V battery electrical system failure. Since then I have been stranded 8 total times and the vehicle has been in the service department 14+ times for repeated electrical issues (8 of those visits were related to the same 12V battery electrical system failures. The battery was reportedly replaced in 2024-shortly thereafter I began experiencing issues with the collision assist malfunctioning. The alarms would sound seat belt tighten and brakes lock up while driving on the interstate. …”

NHTSA complaint #11722368, filed 2026-03

“1 ) the car would not start several times. every error message scanned across the screen and i had to leave the car and lock it and wait 10-15 minutes and then it would start. if i had any type of emergency and this happened, it would be detrimental. the first time this happened was the day i got the car with less than 10 miles on it. this issue was recreated by service and a software update was performed and it hasn’t happened since. 2 ) all computers / screens turned off while the car was in drive and in motion. horrifying and so dangerous. …”

NHTSA complaint #11536621, filed 2023-08

“The care sends a message that the battery is low. Then the check engine light comes on till we drive the car for awhile. The first time this happened I took it to the dealer and they said they could find nothing wrong with it and was giving no readings. It has continued to happen a lot. The battery should not be going down if it not being used. There has to be a problem. This has been going on for over a year. The dealer where we bought the car called today about service and said there was a recall about the battery, but when I call MB they said there was not recall?”

NHTSA complaint #11615647, filed 2024-09

Related recalls

Related service bulletins

Electrical system: other model years

YearComplaintsShare of year
20251275%
2024629%
20233055%
20221220%
2021812%
202057%
20191430%
20181315%
20171515%
2016118%

Other parts of the 2023 Mercedes-Benz GLC 300

Engine
15 complaintsExterior lighting
10 complaintsOther or unknown
9 complaintsForward collision avoidance
7 complaintsLane departure
6 complaintsBrakes
5 complaintsFuel system
5 complaintsBody and structure
4 complaintsTransmission and drivetrain
3 complaintsSteering
2 complaintsVehicle speed control
1 complaintsVisibility (wipers, defrost, mirrors)
1 complaints

← All problems reported for the 2023 Mercedes-Benz GLC 300

About this data. Data from NHTSA (ODI) complaints, recalls, TSBs and investigations, updated Oct 27, 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