Thanks Fred and Gilly. I'll flush the system out and refill tomorrow. Filter is only 3 weeks old, as I did a major service 3 weeks ago. I only changed the filter- not the fluid. Can I just unhook the return line, drain while the car is idling, while at the same time pouring new fluid in the resevoir? Is there a better way? I don't find anything in the FSM CD.

Mike

__________________
'90 300SE 298k
-300K and it gets put into retirement.
'80 300D 255k Purchased new by family in 1980.

Had a:
1973 220 (gas)
1980 300SD
1992 400E