The first-generation GLA is a compact crossover based on the MFA platform shared with the A-Class W176, B-Class W246, and CLA C117. The GLA 200 uses the 1.6-litre M270 turbocharged four-cylinder producing 156 hp, paired with either a 7G-DCT dual-clutch automatic or a 6-speed manual. It offers a raised driving position, premium interior, and reasonable fuel economy. The 2017 facelift brought cosmetic updates and revised infotainment.
Premium feel at compact SUV price
Proven M270 engine when maintained
7G-DCT can be jerky in traffic
Timing chain tensioner wear risk
Buy if: You want a premium compact crossover with a manual gearbox or a well-documented DCT with regular oil changes.
Avoid if: You mostly drive short city trips with the 7G-DCT automatic, or a cold-start rattle is present during your inspection.
Expected Annual Maintenance Costs
Common Problems
Clutch pack and mechatronics wear, especially with heavy urban driving and neglected oil changes · more· less
The Getrag 7G-DCT (724.0) dual-clutch transmission in the GLA 200 is prone to jerking at low speeds, vibrations between 20 and 40 km/h, and clutch slippage when hot. Worn clutch plates (thickness below 1.8 mm) are the cause in roughly a third of cases. Problems typically appear between 70,000 and 120,000 km, particularly on cars used primarily in city traffic. Over 70% of faulty gearboxes had never had an oil change in the first 100,000 km. A clutch pack replacement costs approximately €900-2,000, while mechatronics repair or replacement runs €1,200-3,000. Regular gearbox oil changes every 60,000 km using MB 236.21 specification fluid significantly reduce the risk. Manual gearbox variants are unaffected.
Chain stretches over time, causing metallic rattling on cold start and risk of engine damage if ignored · more· less
The M270 1.6 engine uses a timing chain that can stretch prematurely, particularly on early 2014-2015 models. The tensioner loses pressure overnight, resulting in a distinctive metallic rattle for a few seconds on cold start. This typically begins between 100,000 and 150,000 km. If the rattle persists for more than a few seconds, the chain, guides, tensioner, and sprockets all need replacing. Parts cost €150-400 depending on quality, but labor is substantial due to the transverse engine layout. Total replacement cost is €900-1,800. Ignoring the issue risks catastrophic valve-piston contact. Mercedes has updated the tensioner part (A2700521400). Regular oil changes at shorter intervals than the factory-recommended 25,000 km help extend chain life.
Electronic thermostat with integrated heating element fails, causing overheating or the engine running cold · more· less
The M270 uses an electronically controlled thermostat housing located at the bottom of the engine, making access difficult. Failure typically occurs between 60,000 and 100,000 km. Symptoms include the temperature gauge not reaching normal operating temperature, poor cabin heating in winter, or intermittent overheating warnings. The OEM part costs approximately €150-200, but labor is around 3-4 hours due to the thermostat's position. Total replacement cost at an independent shop is €400-600, or €600-800 at a Mercedes dealer.
Direct injection causes carbon deposits on valves, leading to misfires and power loss over time · more· less
Like all direct-injection petrol engines, the M270 is susceptible to carbon buildup on the intake valves because fuel is sprayed directly into the cylinder rather than washing over the valves. This gradually reduces performance and can cause rough idle, misfires, and reduced power. Symptoms typically become noticeable after 80,000-120,000 km, depending on driving style. Short trips and gentle city driving accelerate the problem. Walnut blasting is the most effective cleaning method, costing €300-600 at a specialist. Some owners report improvement with regular use of intake cleaning additives and occasional spirited driving.
Wastegate actuator sticks from carbon buildup, causing boost pressure faults or limp mode · more· less
The turbocharger wastegate actuator on the M270 can stick due to carbon buildup, particularly on cars driven gently or only on short trips. Symptoms include loss of power, the engine entering limp mode, or the check engine light illuminating with boost pressure fault codes. Mercedes' standard policy is to replace the entire turbo assembly, which can cost €1,200-1,500 at a dealer. However, independent specialists can often replace just the actuator for €400-600. Regular spirited driving helps prevent the issue by keeping the actuator moving freely.
Gasket degrades after 80,000-120,000 km, causing oil seepage and burnt oil smell · more· less
A common M270 issue where the valve cover gasket hardens and begins leaking oil onto the exhaust manifold, producing a noticeable burnt oil smell from the engine bay. While not immediately dangerous, the oil can contaminate nearby components and create a fire risk if left unaddressed. The gasket itself costs €30-60 for aftermarket or €80-120 for OEM. Labor is 1.5-2 hours. Total repair cost is €200-400 depending on the shop.
Small backup battery for the start-stop system fails, triggering warning messages and disabling features · more· less
The GLA 200 uses an auxiliary battery located under the passenger seat floor to power the start-stop system and comfort features when the engine is off. This battery typically lasts 3-5 years before needing replacement. When it fails, the start-stop system stops working and various warning messages may appear on the dashboard. The battery costs €80-150, and replacement is straightforward. Some owners replace it themselves in under 30 minutes. At a dealer, expect €200-300 including labor.
Moderate reliability with known weak points that respond well to maintenance
The M270 1.6 petrol engine in the GLA 200 is generally solid when properly maintained, with many examples exceeding 200,000 km. The main concerns are the 7G-DCT gearbox (regular oil changes are essential), the timing chain tensioner on early models, and carbon buildup from direct injection. Manual gearbox variants are significantly more reliable. Shorter oil change intervals (every 10,000-15,000 km rather than the factory-recommended 25,000 km) dramatically improve long-term engine reliability.
Recalls and Technical Service Bulletins
Camshaft weld positioning (July-August 2015 build)
Verify completed
Front passenger airbag deployment (Sep 2014-Nov 2014 and Aug 2016-Mar 2017 build)
Critical - verify completed
Window airbag manufacturing defect (June 2017 production)
Verify completed
Driver airbag electrostatic discharge risk (selected 2018 models)
Verify completed
Takata airbag inflator (various production dates)
Verify completed
Panoramic sunroof bonding (2015-2019, after prior repair only)
Verify if applicable
Contact Mercedes-Benz with the VIN to verify all recalls have been completed. The airbag recalls are particularly important for safety. The camshaft recall affects a limited production window but can cause engine damage if not addressed.
Warranty Status
Factory warranty (2 years)
Expired on all used GLA X156 models
Rust perforation warranty (30 years)
May still be active on newer examples
Extended warranty availability
Available through Mercedes-Benz dealers
All GLA X156 models are now outside their original 2-year factory warranty. Mercedes offers extended warranty programmes through their dealer network. The 30-year rust perforation warranty may still apply on younger examples.
This report is for informational purposes only and does not constitute professional advice. Estimates may be inaccurate. Always have a qualified specialist inspect the vehicle before purchase. We accept no liability for decisions made based on this information.