I did changed the light switch too. Mines failed and one can keep turning it.
The wrecking guy sold me a european 300se as it has a vacuum switch next to it, to do the headlight tilt.
There're obviously more connectors than mines. I slowly wrote down all the connectors and switch her over. My 190e does not need all the terminal, in the end they all worked.

Well thank God your system is all working now.

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