The harmonic balancer rubber problem is the same for V6's and V8's, and it also includes the 2.8 liter V6 in the C280 from 1998-on.
Benzmac started a thread on this the other day:
Crankshaft Balancer Failure! UPDATED
2001 E430, Bourdeaux Red, Oyster interior.
1973 280SE 4.5, 170,000 miles. 568 Signal Red, Black MB Tex. "The Red Baron".