Both my new CLK500 and my new E320 have small differences between the speedometer and the cruise control. Is there any way the individual owner can correct this, or is it a dealer-only job?

On the CLK, with the cruise set at 100 km/h, the speedometer stays at 97. For the E-class, it stays at 98.

Momo

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1990 500SL 65k km - until May 11 2004
2004 E320 4-Matic wagon
2004 CLK500 Cabrio from May 11 2004