Top Mercedes-Benz GLC fixes every owner should know

TL;DR

The Mercedes-Benz GLC has common faults including electrical issues, suspension wear, oil leaks, brake problems, and cooling system issues. Repair costs vary, with parts ranging from £20 to £300 and labour from £50 to £150 per hour, depending on the complexity of the issue.

Electrical Issues

One common problem in the Mercedes-Benz GLC is electrical faults, particularly with the battery and alternator. Symptoms often include dashboard warning lights and difficulty starting the engine. DIY fixes may involve checking battery connections and replacing fuses, which can cost around £20 for parts. However, if the alternator needs replacing, expect to pay £150 to £300 in parts and £100 to £150 in labour at a garage.

Suspension Wear

Suspension components, especially the front struts, can wear out over time. Owners may notice a bumpy ride or unusual noises when driving. Replacing struts is a job that can be tackled by experienced DIYers, with parts costing around £100 to £200 each. Garage labour for this job typically ranges from £100 to £200, depending on the complexity.

Oil Leaks

Oil leaks are another issue that GLC owners may face, often caused by worn seals or gaskets. A temporary fix may involve using sealant, which can cost around £20. However, for a permanent solution, replacing the affected seals or gaskets is necessary, with parts costing between £30 and £100 and garage labour ranging from £50 to £100.

Brake Problems

Brake wear is common in the GLC, particularly with the brake pads and discs. Owners should regularly check for squeaking noises or reduced braking performance. Replacing brake pads is a straightforward DIY task, costing about £30 to £70 for parts. Garage labour for this job typically costs between £50 and £100. If the discs also need replacing, expect to pay an additional £50 to £150 for parts and labour.

Cooling System Issues

Cooling system problems, such as leaks from the radiator or hoses, can lead to overheating. A DIY fix might involve replacing a hose, costing around £20. If the radiator needs to be replaced, parts can cost between £100 and £200, with garage labour ranging from £100 to £150. Temporary fixes like sealants may provide a short-term solution but are not recommended for long-term reliability.

Mercedes-Benz GLC MOT record

From 82,665 recorded MOT tests, 11.9% failed.

MOT pass and failure rates by year of first registration
Registered	Tests	Failed	Median mileage
2022	7,010	7.4%	27,272 mi
2021	6,423	7.6%	36,537 mi
2020	10,957	8.8%	41,890 mi
2019	16,922	11.8%	48,629 mi
2018	18,673	14.1%	57,262 mi
2017	12,350	14.0%	67,535 mi
2016	9,020	15.0%	76,536 mi
2015	1,310	15.4%	81,506 mi

Most common reasons for failure

Tyre tread depth not in accordance with the requirements35.6%
A tyre seriously damaged21.7%
A suspension pin, bush or joint excessively worn21.6%
a brake lining or pad worn below 1.5mm12.9%
Brake disc or drum excessively weakened, insecure or fractured8.2%

Figures cover every Mercedes-Benz GLC tested in the DVSA dataset, not this specific car. Check a registration for the actual history of one vehicle.

Mercedes-Benz GLC official figures

Median across 28 variants on sale, diesel electric, electricity / diesel, electricity / petrol, petrol electric.

Combined economy

42.7 mpg

WLTP median across variants

CO2 emissions

161.5 g/km

Sets the first-year tax rate

Electric range

69.5 miles

Manufacturer WLTP figure

Official figures for new cars. Real economy varies with driving, load and conditions.

Frequently asked questions

What are common faults with the Mercedes-Benz GLC?

Common faults include electrical issues, suspension wear, and oil leaks.

Can I fix these issues myself?

Some issues are DIY-friendly, while others are best left to a garage.

How much do repairs typically cost?

Costs vary, but parts can range from £20 to £300, and labour from £50 to £150 per hour.

Are there temporary fixes for these problems?

Some fixes may be temporary, while others offer a long-term solution.