In my E53 you could get the Biz Computer to show you your instantaneous actual speed, which is different from the speedo readout. The speedo readout always shows 5-10% less than actual.

In my E70 all the electronic speed readings seem to match the speedo which is 5-10% less than actual. Is there a way of getting your actual speed in the E70 rather than the discounted value on the speedo??

This was a great feature on the E53.