A vibration felt through the center floor of the vehicle can be caused by driveshaft flex discs, which crack and shred, causing excessive driveshaft movement. Not repairing these can cause damage to the driveshaft center support bearing, or, in the worst case scenario, damage to the transmission or differential.Google+
Car Problem Reports
Mercedes-Benz C300 Cracked Driveshaft Flex Discs May Cause Driveshaft Movement/Vibration
Mercedes-Benz C300 Problem
Drive Train Affected: Automatic Transmission
Average Mileage: 52,437 mi (14,000 mi - 88,000 mi)
Visitor, 2010 Mercedes-Benz C300, Automatic Transmission, 40,000 mi
vibration from center of car
new transmission fitted under warranty
Visitor, 2010 Mercedes-Benz C300, 43,500 mi
Very load vibrating sound.
Visitor, 2010 Mercedes-Benz C300, Automatic Transmission, 24,000 mi
Knocking noise notices when turning right primarily. I sometimes hear the same noise when turning left. I thought it might be associated with rear struts or shocks.