Mercedes Transmission Mount Failure Explained | South Bay Autohaus A bad transmission mount can cause more than just noise. Josh explains what happens when it fails and why it matters for your Mercedes. When a transmission mount goes bad, the effects show up quickly in how your Mercedes drives. Vibrations, unusual noises, and poor shifting are common signs that something is wrong. In this reel, Josh explains how the transmission mount supports engine and drivetrain stability, and what happens wh