Need help diagnosing a 1995 E320 that runs around 60*C on the highway and 100*C stuck in traffic. I resolved a similar problem on a 1990 BMW 325i by replacing the fan clutch...but I read that I shouldn't touch the W124 fan clutch unless I hit 105*C or greater. Previous Mercedes with thermostats stuck open never hit 100*C no matter the conditions. Car is new to me so I don't have much service history. P.S. I never hear the characteristic roar if I accelerate with coolant temp above 100*C.

Let me know what you think.

Thanks!

Luke

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1982 300D-T (sold)
1988 300E (sold)
1994 E320 Wagon (sold)
1995 E320
1998 E300D-T
1999 E3204M Wagon
2001 E320
2005 E320 CDI