I took my X5 in today because the Speedo is registering about 5 mph above what i am actually traveling, kinda wierd.
BMW prints out a paper showing that actually speedometer error can be as much as 10% plus 2.5mph. however,it does say that only higher then actual speed, and it says that odometer wont be effected by it.
this is crazy. so when my speedo says 90mpg I could possible be going 79.5 how rediculous is that?

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M3