I monitored the other postings. Thanks for the information.
My 350SDL has been pretty nice so far ... only odd item is that I will occasionally get a brief puff of smoke and loss of power for a 1/2 second. I believe it is ingesting carbonated oil residue from the valve cover area that has become hardened- perhaps by the EGR input from the exhaust ... not sure, actually.
What a great car, though.
The cooling issue is still stable with 82-85C in normal conditions - warms up in 98F, but never above 100 even with AC on in stop and go.
Most interesting observation is that it warms up so fast - assume this is the new tstat.
Would appreciate any interesting info not already on a thread.
1991 350 SDL (200K and she ain't bent, yet)
former 2002 E320 4Matic Wagon - good car
former 1985 300 CD - great car
former 1981 300 TD - good car
former 1972 280 SEL - not so good car
a couple of those diesel Rabbits ...40-45 mpg