Our local dealer MB tech who has his own 500E, said the R129 specific transmission oil-filter that has an "acceleration check-valve" is not necessary since the filter is bathed in tranny-fluid.

At over $55/each vs. the $12/each for the standard W126 tranny oil-filter, is it really worth it?

Is he correct? I would think the "Factory" knows best, but who knows.

Why doesn't the C36 or C43 which has the same pan, also use the same "acceleration check-valve" in their trannys?

Both pull just as fast as our 500E's, at least upto 90 MPH.

BTW: what would happen if I installed a R129 "acceleration check-valve" filter into our C36 tranny?

:-) neil
1988 360TE AMG
1993 500E

Neil, Yes You Should use The Transmission filter with the Check valve to Avoid Caviation of the trans fluid...Mercedes did it for a Good reason...When I Worked for mercedes They allways gave out OE filters..


Contact The outside Part supply sources for a filter..Fast Lane!
Save Some Money...Its The Filter manufacture is all you want...
Not that Big Buck Mercedes Box it comes in!

Mark- think it is worth while for my C36 powered wagon? I guess it couldn't hurt anything, except perhaps my wallet . . .

:-) neil
1988 360TE AMG
1993 500E

Neil, I Would Install it in the C36 Estate ...Its Cheap Insurance!
After all you Do Track it ......
Just Buy The Filter on The Aftermarkit..It Wont Hurt as Bad