What is the 2021-2023 Mercedes-Benz GLC Fuel Pump Shutdown Causing Loss of Drive Power (Recall)?

Recall 23V445 directly covers 43,257 model-year 2021-2023 GLC 300 vehicles with fuel-pump impellers that may not meet material specifications. An affected impeller may deform, contact the pump housing and create mechanical resistance; in some instances the fuel pump can shut down… Severity: high.

What is the 2020-2023 Mercedes-Benz GLC 48V Mild-Hybrid (EQ Boost) Integrated Starter-Generator Failure?

GLC 300 models with the M264 engine use a 48-volt mild-hybrid system with an Integrated Starter-Generator (ISG) mounted between the engine and transmission, fed by a small lithium-ion battery. The ISG, its 48V battery, or a loose/overheating 48V ground connection can fail, trigge… Repairs typically run $1,000-$7,000. Severity: high.

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 2016-2023 Mercedes-Benz GLC Cold-Start Camshaft Adjuster (Magnet/Solenoid) Rattle?

On the M274/M264 2.0L turbo engines used in the GLC, the intake camshaft adjuster relies on an internal locking pin that wears over time. Without oil pressure at cold start, the adjuster fails to lock in its default position, producing a distinct metallic rattle for 2-4 seconds o… Repairs typically run $800-$2,500. Severity: medium.

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 2016-2023 Mercedes-Benz GLC Panoramic Sunroof Creak and Rattle?

The panoramic sunroof develops creaking and rattling noises over bumps and temperature changes. The glass panel expands and contracts differently than the metal frame, creating friction-induced squeaks especially in cold weather. Repairs typically run $0-$500. Severity: low.

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.

What is the 2016-2023 Mercedes-Benz GLC Power Tailgate Gas Support Strut Failure Causing the Liftgate to Drop or Slam Shut?

The GLC power tailgate uses a motorised spindle drive on one side and a gas-charged support strut on the other. When the gas charge leaks out of the passive strut, the tailgate no longer has enough force to stay up: owners describe the boot opening normally and then immediately c… Repairs typically run $120-$450. Severity: low.

Mercedes-Benz · Known Issues

2023 Mercedes-Benz GLC Problems: 12 Known Issues

2023 model year · 2,200+ owner reports · Updated September 2026

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According to Au7o's analysis of 2,200+ owner reports, the 2023 Mercedes-Benz GLC has 12 documented known issues, with 7 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), Fuel Pump Shutdown Causing Loss of Drive Power (Recall), 48V Mild-Hybrid (EQ Boost) Integrated Starter-Generator Failure ($1,000-$7,000 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 Panoramic Sunroof Creak and Rattle with 1,100 owner reports.

Frequently Asked Questions

What are the most common Mercedes-Benz GLC problems?

According to Au7o's analysis of 2,200+ owner reports, the 2023 Mercedes-Benz GLC has 12 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, 7 are rated critical and should be addressed promptly.

Is the Mercedes-Benz GLC reliable?

The 2023 Mercedes-Benz GLC has 12 known issues documented across 2,200+ owner reports. 7 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 Fuel Pump Shutdown Causing Loss of Drive Power (Recall) and 48V Mild-Hybrid (EQ Boost) Integrated Starter-Generator Failure 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 $7,000, 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 12 Known Issues

Other Mercedes-Benz Models

Frequently Asked Questions

What are the most common Mercedes-Benz GLC problems?

Is the Mercedes-Benz GLC reliable?

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

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

What is the 2023-2026 Mercedes-Benz GLC Steering Coupling Bolt Loosening / Loss of Steering Control (Recall)?

When Issues Typically Appear

2020-2023 Mercedes-Benz GLC: 48V Mild-Hybrid (EQ Boost) Integrated Starter-Generator Failure#

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)#

2021-2023 Mercedes-Benz GLC: Fuel Pump Shutdown Causing Loss of Drive Power (Recall)#

2016-2023 Mercedes-Benz GLC: Panoramic Sunroof Creak and Rattle#

2016-2023 Mercedes-Benz GLC: Power Tailgate Gas Support Strut Failure Causing the Liftgate to Drop or Slam Shut#

2016-2023 Mercedes-Benz GLC: Cold-Start Camshaft Adjuster (Magnet/Solenoid) Rattle#

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

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