Mercedes-Benz Mercedes A-Class 2012-2018 Drivetrain Specifications

The 2012-2018 Mercedes A-Class features a front-wheel-drive (FWD) system as standard, with optional 4MATIC all-wheel-drive (AWD) on select models. The drivetrain is paired with either a 6-speed manual or a 7-speed dual-clutch automatic transmission (7G-DCT). Engine options range from 1.5L to 2.0L turbocharged petrol and diesel variants, delivering power outputs between 109 to 381 horsepower, depending on the model and trim.

Regular maintenance for the A-Class drivetrain includes checking and replacing transmission fluid every 40,000-60,000 miles, inspecting the driveshaft and CV joints for wear, and ensuring the differential fluid is changed every 50,000 miles. Additionally, the 4MATIC system requires periodic checks of the transfer case and front/rear differentials. Always refer to the owner’s manual for specific intervals and procedures.

Replacing drivetrain components, such as the driveshaft or CV joints, requires lifting the vehicle and removing the wheels. Disconnect the driveshaft from the transmission and differential, then replace the worn components. For transmission replacement, drain the fluid, disconnect the linkages, and remove the mounting bolts. Always use OEM or equivalent parts and torque all bolts to manufacturer specifications. Professional assistance is recommended for complex tasks.

Common drivetrain issues include transmission jerking or hesitation, often due to software glitches or worn clutch packs in the 7G-DCT. Noises from the driveshaft or CV joints may indicate wear or misalignment. For 4MATIC models, uneven tire wear or binding during turns can signal differential or transfer case problems. Diagnose issues using a Mercedes-specific scan tool and address them promptly to avoid further damage.

To optimize drivetrain performance, ensure regular maintenance, including fluid changes and component inspections. Upgrading to high-performance transmission fluid can improve shifting smoothness. For 4MATIC models, ensure all tires are of the same size and tread depth to prevent strain on the system. Consider a performance tune to enhance throttle response and transmission shift points, but ensure compatibility with your vehicle’s specifications.