Why does my car shake when I step on the accelerator and when it changes gears?

If the engine light flashes during the symptom, it implies an engine misfire. If not, you may have a drivetrain issue. Scanning the control modules for event data, road testing, and an on lift inspection will allow a qualified technician to determine what's wrong.

is your ck eng light on?

It may be several things have the car inspected by a shop familiar with Mercedes-Benz vehicles. Possible causes include mounts, suspension, transmission or transfer case problems.. This type of symptom is impossible to properly diagnose without road testing the vehicle. If we can help give us a call.