Now, don't be a spoil sport!
I don't know why. It does not seem to be slipping. If it were slipping it would not be consistant about it would it?
Hmmmm I wonder if it might be a speedo for a 2.88 rear? But the speedo seems to be right on the money.
Its the most inaccurate odo I can remember in a benz. They are usually only one or two percent off.
Tom W
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[SIGPIC] Diesel loving autocrossing grandpa Architect. 08 Dodge 3/4 ton with Cummins & six speed; I have had about 35 benzes. I have a 39 Studebaker Coupe Express pickup in which I have had installed a 617 turbo and a five speed manual.

[SIGPIC]
..I also have a 427 Cobra replica with an aluminum chassis.