Does the car have a viscous fan clutch (VFC)? If it's not hooking up properly under hot conditions, that will cause high running temps. The VFC in my 95 S600 spun the fan while hot, but the fan could be stopped very easily with a length of rubber hose. With the engine shut off, I was able to spin the fan too easily. It should have been much stiffer. Once I pulled the old one out, I could see that much of the oil inside the chamber had leaked out. I replaced the VFC, and now run no hotter than 105 C in stop and go traffic with AC on and ambient temps of 100 F. It usually runs around 87-90 C now, where before it shot up to 120 C even when cold outside.

__________________
1995 S600, 1 of 618 (sold)

"Speed is just a question of money...how fast you wanna go?"

LONG LIVE THE W140!
Visit my Web Page at www.v12uberalles.com