When I had A/C issues on my SD, my Klima relay had a bad trace on the PCB.

The tach is driven off that EGR computer, in the W126 it is in the passenger kick panel area. W123 I have no idea.

I am sure you could just jump the OVP with a length of fused wire.

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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]