Your fingers should be sufficient to turn the nut. The hub contains a pair of taper roller bearings, once the nut is removed and the washer behind it the hub will just slide off.
Keep it all very clean, grit will do no end of harm especialy between the nut/washer and bearing face where it will allow the hub adjustment to vary. Ensure that there is no muck on the seal surface and its journal before you reassemble.
On reassembly the hub should be adjusted to give an almost negligible end float of 0.001 to 0.002mm, thats about one tenth of a human hair. I have been told that if you can just about rotate the washer it will be as near as makes no odds, if you can't it is too tight.
Nip up the clamp screw to take all the slack out of the threads before you make the final setting, clamp it just so much that you can only just turn the nut with your fingers.
Once you are happy with the adjustment tighten the clamp and check again for end float.
Its either 22 or 24mm, but you should not need a spanner. The allen key for the pinch bolt/clamp screw is 5mm.
Mercedes-Benz Servicing, repairs, engine and diagnostics Wayne Gates - Mercedes-Benz, Unit F3, Phoenix Industrial Estate, Rosslyn Crescent, Harrow, Middlesex, HA1 2SP Tel: 020 8863 9233 Established for 20 years all vehicles washed and vacuumed.
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