Transmission Slip Into Neutral While Driving: Causes, Diagnosis & Fix A sudden slip into Neutral while driving is one of the most alarming transmission faults a Mercedes owner can face. Power drops to zero, engine revs flare, and safety is ...
Quick answer “Collision Prevention Assist Plus Inoperative” means the Mercedes radar-based automatic emergency braking system has detected a fault and shut itself down. The most common causes — in workshop order — are: dirty or misaligned radar sensor, weak auxiliary ...