Checking software version

From and including week 39 year 2007, there is software with greater tolerance for different wheel speeds, this to minimize the risk of incorrect engagement of four-wheel drive at, e. g., slightly unevenly worn tires. The rolling circumference may vary slightly even on new tires.

Check if new software is available for download in Differential electronic module (DEM).

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  Refer to Test driving and reading off diagnostic trouble codes (DTCs)