I had this problem on a 90 E300 and now on a 92 E400. The seat switch sometimes does not activate the seat, but sometimes it feels and Sounds, like a pinball machine under the seat cusion, or will start making it's own adjustments at will. Don't think it's the 2 program seat switch. Even with key off it taps away.
Is it just relays and how big a deal [$ and time] is it?
Joe

Moved to Tech Help.

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Chris
2007 E550 4Matic - 61,000 Km - Iridium Silver, black leather, Sport package, Premium 2 package
2007 GL450 4Matic - 62,000 Km - Obsidian Black Metallic, black leather, all options
1998 E430 - sold
1989 300E - 333,000 Km - sold
1977 280E - sold
1971 250 - retired

"And a frign hat. They gave me a hat at the annual benefits meeting. I said. how does this benefit me. I dont have anything from the company.. So they gave me a hat." - TheDon

It could just be a groady switch - If you have the patience, you can take it out and c a r e f u l l y clean it.
If I remember right, someone did this, and I think even posted some pictures. Try doing a search for it

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It is a truism that almost any sect, cult, or religion will legislate its creed into law if it acquires the political power to do so. Robert A. Heinlein


09 Jetta TDI
1985 300D