I have a 202 kompressor with 722.6 stuck in limp mode, model year 99 (10/98 mfg.) with 232,000mi. It will start off in 2nd gear, 1st if in sport program, and shift until 3rd where it sticks. Consistently sets code 147 in EGS as read with star machine.

I know that the trans isn't actually slipping, for a while I could put it in drive and then pop it down to fourth before the first shift and would then have all 5 gears and be able to drive relatively normally, only rough shifts due to shift program override, but I can no longer do even that.

The trans was recently swapped for a used unit, with clean fluid and filter. I am using Valvoline Max Life high mileage, which says it is NAG-1 approved and actually used to be on the MB fluid sheet too. It has a new sensor plate and e-plug, and all the solenoids tested good. There was fluid up to the control module in the kick panel, but it looks like someone replaced the module (junkyard numbers on it) and there is no fluid inside it. I have also replaced the selector lever position sensor with MB genuine parts and it reads properly through star machine.

I'm thinking that maybe the trans computer is still bad, but I don't want to just throw one in on suspicion. I want to keep the car for a while, but if it needs too much work I'm just going to junk it. It's worth more in scrap than what I paid for it.

Any ideas?

__________________
Alex
MB Star certified, now independent.
Owner/Operator FDMotorsport Mpls. MN
Mercedes and GM certified transmission rebuilder
We all need a little help sometimes...

1998 E320 4MATIC-- stolen by my sister
1989 300TE-- sold
1999 C230 Kompressor