NHTSA (USA)Critical
At a glance
What can fail
This page covers 7 recalls and 19 owner complaints for the 2024 Mercedes-Benz Glc 300.
Engine and brake complaints lead the 2024 GLC 300 owner reports. On the engine side, owners describe sudden power loss while driving, with the vehicle dropping into a lower gear, the accelerator becoming unresponsive, and warning messages prompting them to pull over and shut off the engine, some report this happening more than once on the same vehicle. Brake complaints center on a spongy, underfoot pedal feel after highway driving, where owners say the brakes felt unresponsive until the pedal was pressed to the floor, sometimes accompanied by a brake warning light. A separate thread involves the automatic emergency braking system activating without any visible obstruction, which owners describe as occurring repeatedly and without warning. A smaller number of reports mention driver assistance features, blind spot monitoring and attention assist, dropping out unexpectedly mid-drive.
19
Total Complaints
1
Crash-Related
2
With Injuries
By System
The 2024 Mercedes-Benz GLC 300 has 7 recalls, the most serious being a cluster of structural and mechanical defects that can cause sudden loss of steering control, loss of drive power, or engine support failure, all of which raise the risk of a crash.
On the structural and drivetrain side, a steering coupling bolt may not have been properly tightened, allowing the steering rack connection to loosen and leaving the driver without steering control. The carrier that supports the engine may have inadequate welds and can fail while driving. On 4MATIC models, bolts securing the rear differential may loosen and allow the driveshaft to separate, cutting drive power without warning. There are also two related electrical concerns: certain 80-amp fuses can fail and cut power to critical systems including the airbags and instrument cluster, and some vehicles that received a prior repair for that fuse issue may have had an incorrect fuse box installed, carrying the same risk.
Two body integrity recalls round out the list. Windows across the front, rear, and fixed side positions may not be properly bonded and can detach, and an unsecured windshield may not adequately support the front airbags when they deploy. On vehicles with a panoramic sunroof, the C-pillar behind the rear seats may not absorb enough impact energy in a crash where a rear occupant's head contacts it.
At a glance
What can fail
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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 →
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
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 bolts securing the rear axle differential to the rear axle carrier may loosen, causing the drive shaft to separate from the differential.
What the fix does
Dealers will repair the rear axle differential bolt connection at no cost to you.
Summarized — see the official notice for exact wording, dates, and contacts.
At a glance
What can fail
The integral carrier that supports the engine may fail due to improper welds, potentially causing loss of vehicle control.
What the fix does
Dealers will replace the integral carrier at no charge.
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 front, rear, and fixed side windows may not be properly secured and could detach. The windshield may also fail to properly support the front air bags during deployment.
What the fix does
Dealers will inspect and replace the front, rear, and fixed side windows as needed, at no cost.
Summarized — see the official notice for exact wording, dates, and contacts.