Should I save it or ditch it? - PeachParts Mercedes-Benz Forum

Maxbumpo · #33 06-21-2017, 08:24 AM

Daniel,

The drastic change for the worse after you added the Lucas tells me that was a bad idea, and you need to change the fluid and filter. I would say that the odds are excellent that you'll see a dramatic change for the better. Don't hesitate, just get it done. No, changing fluid and filter on an old transmission will not cause it to fail, that is rumor.

After you change the fluid, perform this test: disconnect the vacuum from the trans, and test drive. The shifts should be incredibly hard, but no flaring or slipping. If no flaring / slipping, then all your trans needs is some proper attention, like a new vacuum modulator or proper set-up of the vacuum system (no leaks). "Tuning" the trans is an art form, one that you can learn, or you can pay someone. If nothing else, you can simply replace the modulator and all the vacuum line connections and fitting to eliminate the leaks, and then you may find that it is good enough to drive or sell.

Regarding your mechanic: Just any old Merc mechanic is better than none, BUT if he or his team don't have experience with MB diesel engines like the OM617.95x in your car, he may not be the right mechanic.

Once you've got the trans sorted, and have done a tune-up and fixed the front end issues, assuming there are no other problems, I would not hesitate to take the car on a long trip anywhere, anytime, cross country or even out of country. These old Mercedes have a reputation for incredible toughness and reliability, but you've got to fix all the neglected issues and deferred maintenance first. Cost of ownership is VERY inexpensive, AFTER you've got it all sorted. If you don't want to turn the wrenches yourself, as previously stated, the labor costs will be high.

If you can tolerate the car down for repairs for a few days or a week, and if you have a place and the time to wrench yourself, keep the car. If you can't afford to pay someone else, then change the fluid in the trans, and sell it to someone else.