Transferring up to 421bhp to the tarmac through the AMG Speedshift DCT 8-speed gearbox and the highly advanced MFA2 front-wheel-drive biased 4MATIC system requires absolute driveline rigidity. Under brutal race starts and aggressive cornering, factory rubber mounts can deflect, leading to lost momentum. While extreme track builds pushing the limits of the M139 may eventually require heavy-duty Clutches, lightweight Flywheels, and stiffened Engine Mounts to handle massive torque spikes, securing your foundation is the crucial first step. Eliminate unwanted driveline movement and secure your chassis by installing stiffened polyurethane Drivetrain Bushes, ensuring every ounce of power reaches the road seamlessly.