1997 E320 722.6 Transmission Computer - PeachParts Mercedes-Benz Forum

dewakin · #1 12-09-2004, 11:39 AM

I have been having some issues with the tranny in my 1997 e320 w/ 131K. When cold, it does not want to shift out of 2nd and sometimes shifts hard as well. I have researched prior threads and think this problem may be related to the transmission computer. I checked for fluid contamination and didn't see any. I see that I have the 020 545 88 32 version and there is mention of installing the better 020 545 92 32 version. Can I just plug this in or is there more to it? Will any 020 545 92 32 work?

I know I should get the codes read but that will cost more then a used tranny computer and if the higher number is a better, plug-and-play unit, I feel I have nothing to loose. Can someone that knows more then me let me know their thoughts on this? Thanks

Dave

Gilly · #2 12-09-2004, 05:58 PM

Not plug and play, have to get a new one and order by VIN.
Gilly

dewakin · #3 12-09-2004, 06:08 PM

Gilly,

I thought I had read in the threads about others buying a used one and being able to just plug it in? Wouldn't one from a same year e320 be the same?

Thanks

Dave

C32AMG · #4 12-12-2004, 10:22 AM

It could be a normal driving condition; the 722.6 transmissions have the catalytic pre heat cold up shift delay; it can also be a driving style shift adaptation, depending on how aggressive you drive the car when cold. A defective transmission range recognition switch can cause erratic shift complaints. The first step in diagnostics is fluid level and condition, reading fault codes and adaptation values.

Gilly · #5 12-12-2004, 06:36 PM

Driving style adaptation is instantaneous, so it's not that.
Gilly