1984 500SE gets hot when sitting in traffic

[VaiFanatic]

Hey all,

I post more frequently over on BenzWorld, but I figured I'd look here for some advice too.

Lately, my 500SE will start warming up past 85-90C (where it usually is) when I'm sitting at a long stoplight or in bumper-to-bumper traffic.

Looking for suggestions as to what I should check when I get back home. Fans seem to be fine, and thermostat as well, but I'll verify that once I get back to San Antonio.

Thanks!