What is the 2023-2025 Mercedes-Benz GLC 12V Board-Net Parasitic Drain from Door Control Modules Leaving X254 GLC Stranded?

Owners of the second-generation X254 GLC report the 12V system going flat after only a few days parked, with a "12V Battery Low" message and, in a number of cases, a no-start and a tow. This is separate from the 48V mild-hybrid starter-generator failure: here the 48V system is he… Repairs typically run $0-$600. Severity: high.

What is the 2017-2024 Mercedes-Benz GLC Active Brake Assist and 360-Degree Camera False Activations (Phantom Braking)?

GLC owners report the driver-assistance suite reacting to obstacles that are not there. The "checking surroundings" screen pops up several times a week with sections of the car outlined in red and nothing nearby, and — more seriously — Active Brake Assist has applied the brakes w… Repairs typically run $0-$1,500. Severity: high.

What is the 2016-2024 Mercedes-Benz GLC LED Headlamp Moisture Ingress and Internal Condensation (Recall 22V261 plus Out-of-Recall Complaints)?

GLC headlamp assemblies collect water inside the lens. Mercedes recalled a narrow build window — 129 units of 2021 GLC 300, GLC 300 4MATIC, AMG GLC 43 and AMG GLC 63/63 S built May-June 2021 — because the sealing plugs in the headlamp connector housing were not properly installed… Repairs typically run $0-$2,200. Severity: medium.

What is the 2020-2025 Mercedes-Benz GLC MBUX Infotainment System Freeze?

The MBUX infotainment system freezes, reboots, or displays a black screen. Bluetooth connections drop, Apple CarPlay/Android Auto disconnects randomly, and the voice assistant becomes unresponsive. Repairs typically run $0-$2,000. Severity: low.

Mercedes-Benz · Known Issues

2024 Mercedes-Benz GLC Problems: 8 Known Issues

2024 model year · 1,100+ owner reports · Updated September 2026

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According to Au7o's analysis of 1,100+ owner reports, the 2024 Mercedes-Benz GLC has 8 documented known issues, with 6 rated critical. The most serious are Air Suspension Compressor Failure ($600-$2,000 repair), Steering Coupling Bolt Loosening / Loss of Steering Control (Recall), Driver Door Lock Micro-Switch Corrosion Preventing Auto-Park / Parking Brake Engagement (Rollaway Recall 26V481) ($0-$0 repair), Infotainment Control Unit Reset Blanking the Instrument Cluster While Driving (Recall 26V281) ($0-$0 repair), 12V Board-Net Parasitic Drain from Door Control Modules Leaving X254 GLC Stranded ($0-$600 repair) and Active Brake Assist and 360-Degree Camera False Activations (Phantom Braking) ($0-$1,500 repair). The most commonly reported issue is MBUX Infotainment System Freeze with 700 owner reports. Across all issues with published estimates, repair costs range from $600 to $2,200. DIY maintenance guides at .

All 8 Known Issues

Frequently Asked Questions

What are the most common Mercedes-Benz GLC problems?

According to Au7o's analysis of 1,100+ owner reports, the 2024 Mercedes-Benz GLC has 8 documented issues. The most frequently reported are: Air Suspension Compressor Failure, Steering Coupling Bolt Loosening / Loss of Steering Control (Recall), Driver Door Lock Micro-Switch Corrosion Preventing Auto-Park / Parking Brake Engagement (Rollaway Recall 26V481). Of these, 6 are rated critical and should be addressed promptly.

Is the Mercedes-Benz GLC reliable?

The 2024 Mercedes-Benz GLC has 8 known issues documented across 1,100+ owner reports. 6 issues are rated critical: Air Suspension Compressor Failure and Steering Coupling Bolt Loosening / Loss of Steering Control (Recall) and Driver Door Lock Micro-Switch Corrosion Preventing Auto-Park / Parking Brake Engagement (Rollaway Recall 26V481) and Infotainment Control Unit Reset Blanking the Instrument Cluster While Driving (Recall 26V281) and 12V Board-Net Parasitic Drain from Door Control Modules Leaving X254 GLC Stranded and Active Brake Assist and 360-Degree Camera False Activations (Phantom Braking). Prospective buyers should inspect for these issues and factor potential repair costs into their purchase decision. Regular maintenance following the manufacturer's schedule helps prevent many common problems.

How much does it cost to fix common Mercedes-Benz GLC problems?

Repair costs for known Mercedes-Benz GLC issues range from $0 to $2,200, depending on the specific problem and whether you choose DIY or professional repair. The most critical issue, Air Suspension Compressor Failure, typically costs $600-$2,000 to repair. Au7o provides step-by-step DIY maintenance guides that can help reduce repair costs.

What is the 2020-2025 Mercedes-Benz GLC Air Suspension Compressor Failure?

GLC models equipped with optional AIRMATIC air suspension experience premature compressor failure. The compressor overheats from compensating for minor air spring leaks and eventually burns out, leaving the vehicle in a lowered position. Repairs typically run $600-$2,000. Severity: high.

All 8 Known Issues

2024-2026 Mercedes-Benz GLC: Infotainment Control Unit Reset Blanking the Instrument Cluster While Driving (Recall 26V281)#

2023-2025 Mercedes-Benz GLC: 12V Board-Net Parasitic Drain from Door Control Modules Leaving X254 GLC Stranded#

2020-2025 Mercedes-Benz GLC: MBUX Infotainment System Freeze#

2023-2024 Mercedes-Benz GLC: Driver Door Lock Micro-Switch Corrosion Preventing Auto-Park / Parking Brake Engagement (Rollaway Recall 26V481)#

2017-2024 Mercedes-Benz GLC: Active Brake Assist and 360-Degree Camera False Activations (Phantom Braking)#

2020-2025 Mercedes-Benz GLC: Air Suspension Compressor Failure#

2023-2026 Mercedes-Benz GLC: Steering Coupling Bolt Loosening / Loss of Steering Control (Recall)#

2016-2024 Mercedes-Benz GLC: LED Headlamp Moisture Ingress and Internal Condensation (Recall 22V261 plus Out-of-Recall Complaints)#

Other Mercedes-Benz Models