The most common presenting symptoms of an occluded pressure line (resulting in NO fuel enrichment and thus 30% less power) in largely city driven MB turbodiesels is erratic or harsh shifting. When you get engine power back up to where 0-62 mph acceleration is about 14 sec, you've already done most of what needs to be done. Get the engine power where it belongs and the shift linkage adjusted PRECISELY where it belongs and WHEN shifting occurs will usually fall into place. If the shifting is then too harsh or too soft then you need to hook up gauges and check the working and modulating pressures.

http://www.continentalimports.com/ser_ic20242.html

http://www.peterschmid.com/1984_617.htm

http://www.peterschmid.com/roadtest.htm

http://business.baylor.edu/Richard_Easley/autofaqs/atcheck.htm

http://transmission.articles.mbz.org/adjust/

http://www.mercedesdismantlers.com/722.3and722.416_transmission_adjustments.html#722.3 and 722.416 transmission adjustments

Marshall