Steve:

Well, you aren't going to HURT it by flushing the tranny, for heaven's sake, just waste perfectly good tranny juice.

Watch out for the smoother and smoother, though -- MB trannies traditionally shift firmly under power, so if you are getting very smooth shifting at wide throttle, you may be aquiring slip instead.

Most people don't change the tranny fluid anywhere near often enough -- and old fluid will cause varnish on frictions and control passages. Eliminating this stuff will make for better operation.

Peter

__________________
1972 220D ?? miles
1988 300E 200,012
1987 300D Turbo killed 9/25/07, 275,000 miles
1985 Volvo 740 GLE Turobodiesel 218,000
1972 280 SE 4.5 165, 000 - It runs!