BTW-I just bought a 350SL slave cylnder off ebay for $50-new in the dealer box. Same one my 3.5 coupe uses. Also Mercedesparts.com has a 3.5 clutch OEM for about $550. My local Mercedes parts guy can get the master cylnder from Germany for about $150. My 4 speed trans is presently being rebuilt by Mercedes Werkstat. It will be about $1250 good as new. Parts are available if one checks around.
Tony

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Tony H
W111 280SE 3.5 Coupe
Manual transmission

Past cars:
Porsche 914 2.0
'64 Jaguar XKE Roadster
'57 Oval Window VW
'71 Toyota Hilux Pickup Truck-Dad bought new
'73 Toyota Celica GT