Late Hard Shifting w/ my E320
 

Alright - I recently got my '97 E320 back from a solid indie - all tuned up from it's 90K check-up which included tranny fluid and filter.

If I shift from revese to drive, with the car close to being warmed up, (55C to 58C) it drops hard into 2nd gear and holds onto 2nd gear up to @4500 RPM. Then it shifts real hard into 3rd gear. It certainly doesn't appear to be the emissions (which normally shifts at 3200 rpm).

This only happens when the engine is just below 60C. If the engine is fully warmed, no problem.

Thoughts please, oh wise ones. Wrong fluid? Sensor? What do you think?????

hard ,late shift when cold
 

sounds like varnish on the valve body of the tranny. Try adding one pint of Marvel Mystery Oil to the tranny. That will usually clean up the varnish. It is also possible a very tiny peice of trash that got into the pressure control valve during the service and is causing it to stick like that. (When in reverse, the oil pressure is at its highest)

I'm not really sure if that's a good idea in the 722.6. You shold check with your mechanic if the level was set properly and discuss the problem futher. The 722.6 is very picky about fluid level, and it takes care to set it perfectly.

Thanks all - so, it sounds like the levels might be off.

Make sure your mechanic used the recommended trans fluid (synthetic Mercedes). Costs around $12/liter.

Make sure your mechanic used the recommended trans fluid (synthetic Mercedes). Costs around $12/liter. Dexron is the wrong fluid for your trans.