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Electrical systemPart report

2019 Mercedes-Benz GLS 450 Electrical system Problems

Complaints
4about this part
Share
16%of 25 total for the year
Median mileage
13,000miles
Trend
Not enough dataFewer than 15 complaints, too few for a reliable trend.

NHTSA recorded 4 complaints about the electrical system of the 2019 Mercedes-Benz GLS 450, 16% of the 25 complaints for this model year. Where a mileage was given, the median is 13,000 miles. 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.

“Driving on freeway at ̃75mph toward 202 w arizona freeway, dashboard showed a engine malfunction + 48 v battery see operator's manual:. 1 minute later another error on screen saying, coolant off turn engine off. Then the car lost the power in the middle lane off freeway. Luckily no cars behind us. Car in service at mercedes dealer in chandler az”

NHTSA complaint #11288497, filed 2019-12, 13,000 miles

“Vehicle was damaged by a school bus hitting the rear passenger corner. It damaged the rear tail light, brake light, turn signal and backup warning sensors. Parts to repair the vehicle are not available for the past 4 months. I called multiple times and the dealer cannot provide a date when the parts will be available. The total cost of repairs is $3200.00. To avoid paying rental car fees that the school would have to pay, I’m driving a unrepaired car. The cost to rent a car would exceed the cost to repair the vehicle by 3-4 times the total repair cost. …”

NHTSA complaint #11528599, filed 2023-06

“The AC/Heating control unit failed prematurely at 40,000 miles, causing a complete loss of cabin heat and windshield defrosting capabilities. This creates a severe visibility and driving hazard in freezing weather, and risks the safety of a dependent child with high medical vulnerabilities.”

NHTSA complaint #11774007, filed 2026-10

“At first, the parking brake assist would appear when vehicle was put into park or when starting. We would have to release the parking brake each time. Then, the parking brake assist light would not go on, but the parking brake assist would engage and or be sticking while driving causing a burning smell and damage to the rear braking system including brake pads and calipers. The independent repair professional described this as being a very premature issue for this vehicle considering the age and mileage. …”

NHTSA complaint #11549440, filed 2023-10

Related recalls

Related service bulletins

Electrical system: other model years

YearComplaintsShare of year
20211445%
20201850%
2019416%
2018214%
2017823%

Other parts of the 2019 Mercedes-Benz GLS 450

Other or unknown
7 complaintsEngine
3 complaintsEngine cooling
3 complaintsTransmission and drivetrain
3 complaintsAir bags
2 complaintsBack-over prevention (rear camera)
2 complaintsBrakes
2 complaintsBody and structure
2 complaintsSuspension
2 complaintsFuel system
1 complaintsSteering
1 complaintsTires
1 complaints

← All problems reported for the 2019 Mercedes-Benz GLS 450

About this data. Data from NHTSA (ODI) complaints, recalls, TSBs and investigations, updated Nov 1, 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