Have a problem with the passenger seat in my 1997 S-500.
It will move down, but when moves up - sounds like a gear with missing teeth. Kind of bumps, but doesn't move the seat.
Is this a difficult fix? Or should I ignore it?

Personally, I wouldn't ignore it. I had a similar problem in my old 420SEL - the gear simply wore out – and finally wore to the point where the seat wouldn’t move. By Murphy’s Law, this occurred far away from home, so driving the car was uncomfortable. Life is a real pain if it fails completely and you can’t move the seat but need to drive!

On my '88, the gear could be changed with moderate mechanical ability, but I have no experience with a '97. I'd take it to a good local automotive upholstery shop.

Of course, if you do not move the seat, it's not a problem. And your's is the passenger seat; which is not a real big inconvenience. But do you really want to own a Mercedes where the passenger seat grinds?

Cheers,
Jeff

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'96 SL600 (105K) Triple Black - Mein über-Fräulein
'79 240D (292K) Yellow/Saddle - Mein Spielzeug
'01 ML430 (123K) Black/Saddle - Wife's Ride
'94 SL500 (164K) Green/Champagne - Daughter's Dream
'73 450SL - RIP
'86 300E - RIP
'88 420SEL - SOLD
'94 S320 - SOLD

Not really.....but it is my wife's seat......