I am in the process of replacing this switch as a pin has broken off somehow. Anyone have an idea what this switch does? Also if anyone knows if the way it is plugged in matters? It doesn't have the usual mercedes grooved plug that allows one way only to plug in. Thanks in advance.

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1994 E320, 145,000 miles

Sends signal to retard timing when that band (B1) is applied.

The electrical connection does not matter.

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wow thanks again mbdoc! I don't know how long it has been this way, but lets see if i notice a difference

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1994 E320, 145,000 miles

Here is a good post on replacing this switch.

Some serious transmission help ASAP!

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1993 400E, 256,000 miles (totaled)
1994 E420, 200,000+ miles
1995 E420, 201,000 miles

thanx emerydc8 nice post will keep those steps in mind ... hopefully will remember to take pics too

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1994 E320, 145,000 miles