Guys, the subject is a 2001 E320. The problem occurs like this:

After 18 hours or so, the passenger side seat switch, electronic mirror, and window motor, no longer function. Essentially the passenger side quarter is dead.

After more time has passed, all of the quarters become dead.

And lastly, after yet more time, the combination stalk fails: The wipers stop working, the blinkers are dead, etc.

Question: Does the PSE Pump control all of these functions?

Another question: Does a PSE Pump have to be coded for a specific car?

Thanks in advance.

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1987 300SDL (324000)

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