NHTSA (USA)Critical
At a glance
This page covers 11 recalls and 55 owner complaints for the 2023 Mercedes-Benz Glc 300.
Electrical complaints dominate owner reports for the 2023 GLC 300, with the 12-volt battery system drawing the most attention. Multiple owners describe repeated battery failures leading to no-start situations, and at least one owner reports being stranded on numerous occasions tied to the same underlying electrical fault. Beyond the battery, owners report broader electrical gremlins including warning lights, display malfunctions, and driver assistance features activating unexpectedly, particularly automatic emergency braking triggering without an apparent obstacle. Engine complaints are the second named system, where owners describe oil leaks and, in some cases, inaccurate oil level readings that don't reflect the actual condition. Exterior lighting rounds out the top concerns, though specific lighting failure patterns vary across reports. The 12-volt battery and associated electrical faults represent the clearest recurring thread in this complaint set.
55
Total Complaints
2
Crash-Related
2
With Injuries
By System
The 2023 Mercedes-Benz GLC 300 has 11 recalls, the most serious involving a steering coupling bolt that can loosen from the steering rack and cause a complete loss of steering control.
Several recalls affect the drivetrain and electrical systems. The fuel pump can shut down unexpectedly and cut drive power, and this covers vehicles across two separate filing windows. An 80-amp fuse can fail and cause a sudden loss of drive power or knock out critical systems including the airbags, seatbelt pretensioners, and the instrument cluster. Vehicles that received an earlier fuse repair may also be affected if an incorrect fuse box was installed during that service. On the engine side, screws on the high-pressure fuel pump can allow fuel and oil to leak onto the road beneath the vehicle.
Interior and structural concerns make up another cluster. Dashboard bolts that are not fully tightened can cause airbags to deploy incorrectly in a crash, and loose wiring connections to the 12-volt auxiliary heater can overheat and create a fire risk. The front and passenger seat rails may not be properly secured to the floor, which can prevent the seat from holding an occupant in a crash. Vehicles with a panoramic sunroof have a separate concern: the C-pillar may not absorb enough energy if a rear occupant's head contacts it in a crash. The front tow eye can detach during towing and separate the vehicle from the tow truck. Headlights on some vehicles are missing adjustment caps, which can allow them to be set at an angle that reduces road visibility.
At a glance
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Complaints are owner-reported and reflect individual experiences, not confirmed defects. They are distinct from recalls. Data sourced from the national vehicle safety complaint database. See trending complaints →
What can fail
The bolt connecting the steering coupling to the steering rack may not be tight enough, which could cause the steering coupling to loosen.
What the fix does
Dealers will tighten the steering coupling bolts to proper specification at no cost.
Summarized — see the official notice for exact wording, dates, and contacts.
At a glance
What can fail
The headlights lack adjustment prevention caps, allowing them to be adjusted incorrectly and fail to meet federal lighting safety standards.
What the fix does
Dealers will inspect the headlights and install adjustment prevention caps where needed, at no cost to you.
Summarized — see the official notice for exact wording, dates, and contacts.
At a glance
What can fail
In certain crashes, the C-pillar may not absorb enough impact force if a rear passenger's head strikes it, increasing injury risk.
What the fix does
Dealers will modify the roof lining and C-pillar trim to improve impact absorption.
Summarized — see the official notice for exact wording, dates, and contacts.
At a glance
What can fail
An incorrect fuse box not designed for your vehicle may have been installed during a previous repair, potentially causing electrical system failures.
What the fix does
Dealers will inspect and replace the main fuse boxes at no cost to you.
Summarized — see the official notice for exact wording, dates, and contacts.
At a glance
What can fail
The driver's and front passenger seat rails may not be properly fastened to the vehicle body due to incorrect attachment during manufacturing.
What the fix does
Dealers will inspect and tighten the bolts securing the seat rails to the vehicle body at no cost.
Summarized — see the official notice for exact wording, dates, and contacts.
At a glance
What can fail
Dashboard bolts may be insufficiently tightened, risking improper airbag deployment or component separation during a crash. Additionally, 12-volt auxiliary heater connections may be loose, potentially causing electrical wiring to overheat.
What the fix does
Dealers will inspect and tighten all dashboard bolts as needed at no cost to you.
Summarized — see the official notice for exact wording, dates, and contacts.
At a glance
What can fail
The 80-Amp fuses in the main fuse box may have been manufactured incorrectly, causing them to fail.
What the fix does
Dealers will replace the main fuse boxes at no cost to you.
Summarized — see the official notice for exact wording, dates, and contacts.
At a glance
What can fail
The fuel pump may unexpectedly shut down, causing the engine to lose power while driving.
What the fix does
The fuel pump will be replaced at no cost to you at an authorized Mercedes-Benz dealer.
Summarized — see the official notice for exact wording, dates, and contacts.
At a glance
What can fail
The high-pressure fuel pump was installed with incorrect screws that may prevent a proper seal between the fuel pump and the tandem oil pump.
What the fix does
Dealers will replace the high-pressure fuel pump at no charge to you.
Summarized — see the official notice for exact wording, dates, and contacts.
At a glance
What can fail
The front tow eye may not be properly threaded onto the crossmember and could detach while you are towing.
What the fix does
The dealer will inspect and replace the front crossmember if needed, at no cost to you.
Summarized — see the official notice for exact wording, dates, and contacts.
At a glance
What can fail
The fuel pump may shut down unexpectedly, causing a loss of engine power while driving.
What the fix does
Dealers will replace the fuel pump at no cost to you.
Summarized — see the official notice for exact wording, dates, and contacts.