Seals for Tachometer Drive?

[TheEngineer]

Please, I need an exploded view of the tach drive: I have removed the tach drive and found two seals: They are deteriorated and must be replaced, but my friendly MB dealer has no record of such seals. One seal may look like an O-ring, it seals against the block, the groove measures 28 mm dia. x 35 mm dia and 2.5 mm deep. The other, seals against the rotating shaft which measures 9 mm and I don't know what it looks like: I just found a few pieces of squishy rubber. Thanx!
'69 280SL,Signal Red,007537,tired engineer, West-Seattle, WA

[hands_aus]

Hey Peter,
 
Borrowed Pics for you

Recently there has been many discussions about this topic. I think some of the part numbers in the second pic have changed. I recommend that you check them.

Download Attachment: TachoDrvParts.jpg
44.67 KB
Download Attachment: TachoVerticleGearAssembly.jpg
30.96 KB

Bob Smith (Brisbane,Australia)
RHD,1967 early 250 SL, auto

[TheEngineer]

Thank you, Bob: This is just what I needed. I've printed your pictures and tomorrow I'll take them down to my friendly MB dealer. Thank you very much.
Pete