A vibration felt through the center floor of the vehicle can be caused by cracked and/or shredded driveshaft flex discs, resulting in excessive driveshaft movement. If not repaired, damage to the driveshaft center support bearing, transmission, or differential can occur.Google+
Car Problem Reports
Mercedes-Benz E320 Cracked Driveshaft Flex Discs May Cause Driveshaft Movement/Vibration
Mercedes-Benz E320 Problem
Drive Train Affected: Automatic Transmission
Visitor, 1994 Mercedes-Benz E320, Automatic Transmission, 124,000 mi
Going at 45 MPH speed all of a sudden there were loud noises, the car started shaking and rhe engine power was lost. It sounded like something had broken, the sound was extremely loud and was banging mixed with grinding. Immediately gear shifter was loose and not staying in gear and car key won't come out.