So, dropping a 603 in a w123. I know there's an idle computer/relay on the 603 and a fine adjustment circuit to it.

What does it need to run? Is it just a circuit hooked up to power, the IP and maybe the tach or crank sensor?

How can I go about making this operate in the w123?

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I recondition w123/w126/w124/w140/r107/r129/ steering boxes!


1984 300D "Elsa" odo reset 6/2011 147k
1983 300TD "Mitzi" ~268k OM603 powered
1995 E300 "Adelheid" 262k [Sold]