i think in some instances it is part of the crank pulley.

i am being told it could be a dealer only item...

it's so uncommon, you can't find much on the search about it.

but, here is what happened...or at least i think what happened..... somehow it went out of round...and it started wearing the camshaft position sensor ( a part mbdoc says does nothing).... i noticed that it was shaving the bottom of the sensor off....into shredded pieces of copper.... at the same time it seemed like my fan bearing bracket was going....

so i replaced the bracket...and a few other things while i was deep into it...

....when i went to put it back together.... still the engine vibration and some rubbing of the fan pulley against the camshaft pulley...

well the the camshaft pulley has a slight wobble to it because the harmonic balancer (rubber) is out of round.

don't know what caused what....but i am not driving the car until i get a good piece of rubber.

i also replaced my upper timing gasket and camshaft gasket , valve cover gasket, and distributor cap and rotor while i was in there.... I am fairly sure they were all original..... 22 years old and 109k miles.

it's a good learning process.

__________________
1989 300ce 129k
( facelifted front,updated tail lights, lowered suspension,bilstein sports, lorinser front spoiler, MOMO steering wheel, remus exhaust,stainless steel brake lines). (Gone)

1997 s320 154k (what a ride). Sold with 179k miles. Replaced with Hyundai Equus

1994 e320 Cabriolet 108k



1972 280se 4.5 153k Owned for 12 yrs, sorry I sold it


[/SIGPIC]