How hot does it run? Do the aux fans operate properly? The thermostat on most Mercedes starts to open at 87C and is fully open at 102C. If it is not going much over 100, it is normal.

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Ali Al-Chalabi

2001 CLK55
1999 Dodge Ram 2500 Cummins Diesel
2002 Harley-Davidson Fatboy
Merlin Extralight w/ Campy Record