Can any one help? I have 85' 190e 2.3 and it runs rough when cold .
specifically hard to start 4-5 cranks. then it idles fine but to try and throttle off idle it spits and sputters until its hot then runs well.
I suspect either cold start valve, auxiliary air device, or the electromagnetic pressure actuator. Can anyone give me ohm readings for these parts so I don't spen a fortune replacing things I don't need. Any other help would be greatly appreciated.
Thanks, Sean

The fuel system computer must power up the EHA (fuel control regulator) so that the engine can run rich when cold.
Sounds like the over-voltage relay isn't powering up the computer. This is a common problem.
Also many times the wires at the EHA break & no power can get there to richen the mixture.

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just one piece of experience - my 190e 2.3 (85) was running rough when cold - replaced plugs, cap/rotor, wires, injectors, air/fuel filter, OVP relay, etc. - nothing helped. replaced the oxygen sensor, runs absolutely fine now, even on cold engine. Maybe something else in your case though!