The Mercedes-Benz A250 is the performance-oriented petrol variant of the A-Class hatch, sold in Australia across two distinct generations: the W176 (sold here from roughly 2013 to 2018) and the W177 (launched in 2018 and continuing into the early 2020s). Both use a 2.0-litre turbocharged four-cylinder petrol engine paired with a seven-speed dual-clutch automatic gearbox (7G-DCT), and the W177 is frequently available with Mercedes-Benz's 4MATIC all-wheel drive. As a used buy, the A250 offers genuine performance credentials and a premium cabin, but both generations carry some well-documented mechanical and electrical weak points that buyers should understand before committing.
7G-DCT Dual-Clutch Transmission
The seven-speed dual-clutch transmission is the single most discussed reliability concern for the A250 in both generations. Unlike a traditional torque-converter automatic, the 7G-DCT uses wet clutches and can behave poorly when neglected or driven heavily in stop-start traffic.
Symptoms to watch for
- Shuddering or juddering when pulling away from a standstill, particularly at low throttle
- Delayed or hesitant engagement when selecting Drive from Park
- Harsh downshifts between third and second gear during deceleration
- Transmission entering limp mode in heavy traffic (overheating protection)
The most common causes are worn clutch packs and degraded transmission oil. Mercedes-Benz originally specified the 7G-DCT fluid as a lifetime fill requiring no changes, but independent specialists consistently recommend a fluid change every 60,000–80,000 kilometres. Buying a used A250 with an unknown transmission service history is a real risk. A fluid change typically costs $300–$500 at an independent specialist; a clutch pack replacement can climb to $2,000–$4,000.
The W177 (2018–on) also attracted an Australian recall in late 2020 (campaign RC2838) affecting vehicles sold between April 2019 and March 2020, where the DCT oil volume was found to be excessive in some units, causing the fluid to foam and the vehicle to stall. If you are looking at a 2019–2020 W177, confirm this recall has been completed via the Mercedes-Benz Australia recall portal before purchasing.
M260 Engine — Cylinder Head and Valve Seat Wear
The W177 A250 uses Mercedes-Benz's M260 2.0-litre turbocharged engine, and a serious fault has been documented in engines produced between approximately 2019 and 2022. The exhaust valve seats and valve guides in the cylinder head can wear prematurely, allowing combustion gases to escape past the valves.
Symptoms
- Rough idle or misfires, sometimes appearing at low mileage (as few as 10,000–40,000 km)
- Check Engine light with misfire-related fault codes
- Noticeably reduced power and elevated emissions
When this fault is present, the entire cylinder head must be replaced — the valve seats cannot simply be reworked. Mercedes-Benz acknowledged the defect and extended warranty coverage for affected M260 engines to 15 years or 241,000 kilometres. If you are buying a 2019–2022 W177 A250 that is still within that window, confirm the vehicle's history and check whether any cylinder head work has already been carried out. A cylinder head replacement outside warranty is a significant repair, potentially $3,000–$6,000 or more at a Mercedes-Benz dealer, though some independent Euro specialists may quote less.
Oil Consumption and Timing Chain
The M260 engine (W177) has a reputation among owners and independent workshops for consuming oil at a higher rate than expected, particularly in higher-mileage examples or those that have been driven hard. Checking the oil level between services is strongly recommended — waiting for the service interval warning on a neglected example can risk engine damage.
Both generations use a timing chain rather than a belt. On the M260 in particular, inadequate oil change intervals or non-approved oil can accelerate tensioner wear. A rattling noise from the engine on a cold start that clears after a few seconds is the tell-tale symptom. Left unaddressed, a slack chain can jump timing and cause catastrophic engine damage. Sticking to oil changes every 10,000 km or annually is the practical advice from Australian independent specialists — rather than relying on the manufacturer's extended service intervals.
MBUX Infotainment and Electrical Faults
The W177 introduced Mercedes-Benz's MBUX infotainment system with its large touchscreen and "Hey Mercedes" voice control. Early production cars (2018–2019 build dates) were more prone to software instability, with owners reporting:
- Complete screen blackouts or frozen displays
- Unresponsive touch inputs and slow system reboot after start
- Intermittent Bluetooth and Apple CarPlay/Android Auto connection failures
- Warning lights appearing without apparent cause (often sensor or software related)
Many MBUX issues are resolved via a software reflash at a dealership, which may be covered under warranty or goodwill. Hardware failures — such as a faulty LVDS data cable between modules or a failed screen unit — can cost $1,500–$3,000 to rectify out of warranty. When inspecting any 2018–2019 A250, cycle through all infotainment functions and confirm software has been updated to the latest available version.
The W177's electronics also place higher demands on the 12V battery. Premature battery failure has been reported by some owners, and a flat or weak battery can trigger a cascade of warning lights and module faults.
W176 Electrical and Steering Issues
The earlier W176 A250 (pre-2018) had its own documented issues, including an Australian recall where insufficient earthing of the steering column switch module could trigger unintended driver airbag deployment. Some W176 vehicles were also recalled due to windshield bonding defects that could compromise front passenger airbag performance in a collision. Confirm all outstanding actions on any W176 via the VIN before purchasing.
Recalls & Safety
Both A250 generations have attracted multiple Australian safety recalls across the years. Carify has recall data mapped for the A250 for 2018, 2019, and 2020 — check the relevant year page for the specific campaigns that apply to the vehicle you are considering.
Notable confirmed Australian recalls for this model include:
- W176 (pre-2018): Steering column airbag deployment risk (RC2437/A, PRA 2018/16572); windshield bonding defect affecting front passenger airbag (PRA 2018/16538); brake booster vacuum hose separation risk.
- W177 (2018-on): Active brake assist radar sensor software fault (RC2707, 2019); air conditioning drain hose mis-installation causing water ingress into electrical components (RC2804, 2020); DCT over-fill causing stalling (RC2838, 2020).
You can browse all recalled models at the Carify car problems and recalls hub, or visit the recalls landing page to search by VIN or model.
Buying a Used Mercedes-Benz A250? What to Check
Given the issues above, a pre-purchase inspection by an independent Mercedes-Benz specialist is strongly recommended. Focus on the following:
- Transmission behaviour: Drive the car in stop-start conditions and from cold. Any shuddering, juddering or hesitation when pulling away is a red flag. Ask for evidence of a 7G-DCT fluid change.
- Engine start-up (W177): Listen for timing chain rattle on a cold start. On M260 engines (2019–2022), ask whether any cylinder head work has been done and whether the extended warranty is still in force on this VIN.
- Oil level: Check the dipstick or electronic oil monitor — low oil on a car that is not due for a service is a warning sign of excessive consumption.
- MBUX system (W177): Test every screen function, voice control, Bluetooth and navigation. Confirm the software version at the dealer.
- Service history: A full stamped log or verifiable dealer history is especially important on the A250 given the transmission and engine sensitivities.
- Recall status: Run the VIN through the Carify VIN check and confirm all outstanding recalls have been completed before you buy.
- Finance and write-off check: Run a PPSR check to ensure the car is not encumbered or a written-off vehicle.
The Verdict
The Mercedes-Benz A250 is a genuinely enjoyable car — punchy turbocharged performance, a premium interior (especially the W177 with MBUX), and strong all-round dynamics. But it is not without risk as a used purchase. The 7G-DCT's sensitivity to maintenance, the M260 cylinder head defect on W177 models, and the early MBUX gremlins mean due diligence is essential. A well-maintained example with a clean service history, verified recall completions, and a fresh transmission fluid change can be a rewarding used car. Skip the checks and you could be looking at repair bills that quickly eclipse the purchase price.