Summary
The Mercedes-Benz GLC 300 has 10 recalls covering the 2019 through 2024 model years, with the most serious being a 2024 engine carrier that can fail and cause loss of vehicle control. The 2024 model year has a second recall as well: front, rear, and fixed side windows may not be properly bonded and can detach while driving, posing a hazard to surrounding traffic, and the windshield may not adequately back the front airbags during deployment, reducing their effectiveness in a crash.
The 2023 model year has the broadest cluster of recalls. Dashboard area bolts on 2023 GLC 300 4MATIC vehicles may be insufficiently tightened, which can cause the airbags to deploy incorrectly in a crash, and loose wiring connections to the auxiliary heater can overheat and start a fire. On 2023 GLC 300 and GLC 300 4MATIC vehicles, the front seat rails may not be properly fastened to the body, meaning the seat may not hold the driver in place during a crash. There is also a 2023 recall where the front tow eye may not be fully threaded into the crossmember and can pull free during towing, separating the vehicle from the tow truck. A separate 2023 compliance recall involves missing headlight adjustment caps that can allow the beam aim to be changed, reducing forward visibility at night.
The 2020 model year has a recall where the power steering control unit wiring harness may have been damaged during assembly, which can either cut power steering assist entirely or short-circuit and cause a fire. On 2019 and 2020 models, the driver's front airbag module may not be properly bolted down, so the bag may not deploy correctly in a crash. The 2019 model year has two separate power steering recalls: one where an internal sensor failure can deactivate assist, and another where the electrical connection between the steering motor and its control unit can fail, both resulting in significantly heavier steering effort and reduced control.
