General Ducato - 9% more kilometers

[Paulo]

Hello,

I've noticed that my motorhome's (a FIAT 2.8, 146 cv/ HYMER B664) mile meter (is this right?) shows approximately 9% more kilometers while comparing to other vehicles.

Today I went to FIAT (here in Portugal) and they changed the meter but the problem is still there. Is there someone out there who can help me fix this problem?

Thank you.

Paulo
(Portugal)

 

[T14086]

Standard tyres/wheels fitted??