> (Before that I thought cooler engine temp is good for the engine).

Why is it not good?

I have ml320 and it runs 81 on freeway but on stops it climbs to 95.
Last year i noticed it when i had a crankshaft sensor go bad in the summer. Normally after engine temperature went over 81 it would stall. Thanks to this forum i fixed it but started to pay attention to engine temp. I flashed the system, using citric acid and mersedes degreeser, refilled with g5 antifreeze but still no luck. I think back in the day when i first got it, it never went over 81.

Now the summer is comming and im thinking about removing the thermostat completely!.

Btw, I put in new wiscose fan cluch too ($185 for the part) with no difference.

So why do u think cooler engine is bad?
Also, can anybody confirm that 95F is normal for ML?

Thanks