The Mercedes-Benz GLC is a compact luxury crossover SUV that was first introduced in 2015. Based on the C-Class sedan platform, the GLC aims to combine the styling, refinement, and prestige of a Mercedes-Benz with the practicality and flexibility of an SUV.
As with any vehicle, the GLC is susceptible to some common mechanical and electrical issues. These problems tend to crop up most frequently once the vehicle surpasses 100,000 kilometers. While the GLC is generally considered a reliable vehicle, being aware of these common problems can help owners address repairs proactively.
Overall, most GLC owners report satisfaction with their vehicles. But improper maintenance, manufacturing defects, or heavy use can lead to issues. The most common problems span across the engine, transmission, electrical systems, suspension, HVAC, infotainment, and more. This overview will provide an in-depth look at the most prevalent GLC repair needs owners encounter.
Engine Issues
One of the most common issues with Mercedes-Benz GLC models is problems with the engine. Two major engine issues that GLC owners report are misfiring cylinders and oil leaks.
Misfiring Cylinders
It’s not unusual for one or more of the cylinders in the GLC’s engine to misfire occasionally. This can cause the engine to run rough, lose power, or stall out completely. Some of the potential causes behind cylinder misfires include:
- Faulty spark plugs that need to be replaced
- Defective ignition coils causing weak spark
- Clogged fuel injectors that need cleaning
- Vacuum leaks throwing off air-fuel mixture
- Low fuel pressure from failing fuel pump or clogged filter
If you experience persistent cylinder misfires, it’s important to have your GLC properly diagnosed and repaired. Continuing to drive with misfiring cylinders can cause catalytic converter failure and engine damage.
Oil Leaks
Oil leaks are another prevalent engine issue on Mercedes-Benz GLC models. Potential sources of oil leaks include:
- Cracked or worn valve cover gasket
- Leaking oil pan gasket
- Rear main seal failure
- Oil cooler lines sprung a leak
- Engine oil filter housing leak
Oil leaks can be tricky to diagnose, as the source may not be obvious. Have your GLC thoroughly inspected to pinpoint all leaks. Neglected leaks can lead to oil burning, low oil levels causing engine damage, or leaks dripping onto hot exhaust components creating a fire hazard.
To avoid costly engine repairs down the road, have any misfires or oil leaks addressed as soon as possible. The specialized Mercedes-Benz technicians at MySyara can properly diagnose and fix any GLC engine issues.
Delayed Engagement
Another common complaint is delayed engagement when accelerating from a stop. The driver steps on the gas pedal but there is a 1-2 second delay before the transmission engages and the vehicle starts actually moving.
The delay occurs because the transmission computer is slow to respond to the acceleration request and signal the appropriate gear change. This problem usually indicates an issue with the transmission sensors or throttle position sensor. Faulty sensors provide inaccurate data to the computer, leading to the delayed response.
Problems like harsh shifting and delayed engagement indicate your GLC’s transmission needs professional diagnosis and service. The technicians at MySyara have extensive experience servicing Mercedes-Benz transmissions. We can diagnose the root cause and repair any issues to have your GLC shifting smoothly again.
Electrical Issues
Electrical problems are common in Mercedes-Benz GLC models, often stemming from faulty sensors or electrical shorts. Some of the most reported electrical issues include:
Faulty sensors
Sensors throughout the vehicle can malfunction and cause all sorts of unpredictable electrical issues. The crankshaft position sensor, camshaft position sensor, MAF (mass airflow sensor), and oxygen sensors seem particularly prone to failure in the GLC. When any of these sensors go bad, it can lead to rough idling, stalling, no starts, reduced power, jerky transmission shifts, and check engine lights. Replacing the faulty sensor will typically resolve the issue.
Worn Control Arm Bushings
The control arms connect the wheel hubs to the chassis and allow the wheels to move up and down while keeping them stable. Rubber bushings cushion the connection points. With age and mileage, these bushings weaken and crack. Symptoms of worn control arm bushings include:
- Clunking noises when going over bumps
- Vibrations through the steering wheel
- Uneven tire wear
- Excessive vehicle swaying
Replacing the control arm bushings requires a shop to remove the control arms and press out the old bushings. Then new bushings are installed and the arms reattached. If left too long, the excessive movement can damage other components.
Brake Issues – Premature Brake Pad Wear
Many GLC owners find they need to replace the brake pads far sooner than expected, sometimes with less than 20,000 km on the vehicle. This premature brake pad wear appears to be caused by a few factors:
- The GLC’s heavy curb weight puts added stress on the brake components
- Mercedes designed the brake pads to be softer for a more comfortable pedal feel. But this comes at the cost of faster wear.
- Problems with the ABS module can lead to uneven pad wear
Replacing the pads frequently can get very expensive. And if the rotors get badly scored from worn pads, the rotors may also need replacement.
Get Your GLC Repaired at MySyara
MySyara is your premier Mercedes-Benz service center in the UAE for repairing and maintaining your GLC-Class SUV. Our experienced, factory-trained technicians have in-depth knowledge of Mercedes-Benz vehicles and use advanced diagnostic equipment to accurately detect and fix issues.
At MySyara, we provide a full range of services for your GLC including:
- Engine and transmission repairs
- Suspension and brake system repairs
- Electrical system troubleshooting and repair
- HVAC system servicing
- Infotainment system upgrades and repairs
- Bodywork, paintwork, and interior repairs
Bring your GLC to MySyara and benefit from:
- Convenient service center locations in Dubai and Abu Dhabi
- Quick turnaround times to get your vehicle back on the road
- Mercedes-Benz genuine parts for proper fit and function
- Competitive pricing on services compared to dealerships
- Shuttle service available for transportation during repairs
- Customer service excellence with transparent estimates
Trust the GLC experts at MySyara to keep your luxury SUV running smoothly for years to come. Contact us today to schedule an appointment or repair consultation.
