Okay, googling I came up with a thread about an 87 420SEL. It said the low speed fan relay is the D position, which on my car is an ice cube relay. I have 3 spare ice cube relays, none of them made it kick on.

The temperature went enough above the 100* mark that I could see the white line below the needle. I turned the ac off and it cooled off a bit, but I popped the hood when it was that hot, and still had the AC on and the fans weren't even on at low speed.

So "stepdown" relay? Where is that located?

__________________
68 280SL - 70 280SL - 70 300SEL 3.5 - 72 350SL - 72 280SEL 4.5 - 72 220 - 72 220D - 73 450SL - 84 230GE - 87 200TD - 90 190E 2.0 - 03 G500

Nissan GTR - Nissan Skyline GTS25T - Toyota GTFour - Rover Mini - Toyota Land Cruiser HJ60 - Cadillac Eldorado - BMW E30 - BMW 135i