Mercedes-Benz GLA (X156) Problems by Year

The first-generation Mercedes-Benz GLA (X156), produced from 2013 to 2020, was essentially a raised, more rugged version of the A-Class hatchback. Designed to capitalize on the booming premium compact crossover market, it offered a slightly higher driving position, chunkier styling, and the option of 4MATIC all-wheel drive, successfully rivaling the BMW X1 and Audi Q3. In the UK, it has been a massive sales success, prized for its high badge appeal, sleek proportions, and efficient engines, though it is often criticized for offering an interior that feels less "premium" than larger Mercedes models. Reliability for the X156 GLA is generally good, as it shares its proven "MFA" platform architecture with the A-Class and CLA, but there are specific drivetrain themes that used buyers must investigate. The 7-speed dual-clutch (DCT) automatic transmission is a common source of complaints; if the fluid is not changed strictly every 60,000 miles or 5 years, it can develop jerky low-speed shifts or require a costly mechatronic repair. The entry-level GLA 180d utilizes a 1.5-litre diesel engine sourced from Renault; while exceptionally economical, buyers must remember that unlike chain-driven Mercedes engines, this unit requires a timing belt replacement every 5 years or 72,000 miles. Additionally, early models are known for interior squeaks and rattles from the dashboard and door trims. When buying a used GLA in the UK, the 2017-onwards facelift models are highly recommended, as they received improved interior materials, updated infotainment tech, and standard LED headlights. Prospective owners should test the DCT gearbox from a cold start to ensure it engages gears without hesitation and check the MOT history for suspension bush wear, which is a frequent advisory on the heavier GLA models. If buying a diesel, scan the car for any hidden NOx or AdBlue sensor faults, as these emissions systems can be fragile if the car is used purely for short urban trips. A well-maintained GLA remains a stylish and practical entry point into Mercedes SUV ownership.

Select a year below to see the specific problems affecting that model year, with estimated repair costs and severity ratings.