Are you referring to that silver box near the blower fan?

'James Dean' and I go around and around with the Gen I system trying to figure out why the hell I have no 'Low' fan speed on my SD. I think it is related to that silver box, but he is pretty sure it is incorrect wiring position. We have tried multiple PBUs, blower relays, etc

In any event, I have more issues with the Gen I HVAC than I ever have with the Gen II stuff.

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I'm not a doctor, but I'll have a look.

'85 300SD 245k
'87 300SDL 251k
'90 300SEL 326k

Six others from BMW, GM, and Ford.

Liberty will not descend to a people; a people must raise themselves to liberty.[/IMG]