E39 abs asc navigation trouble
 

i m in need of some advise please, a few months ago my 1999 528 it abs and asc light came on, speedometer and cruise control stopped working, the rear left wheel sensor was replaced but the problem was not solved, then the abs module at the pump was replaced for a used unit and the lights turn off, drove fine for a month, then the lights came on again, but this time sppedometer works, but now having navigation issues, it takes adresses and shows road directions but the blue arrow that represent the car in the screen do not move, is there another speed sensor other than the wheels sensors? the car has a 5 speed manual transmition,
any advise will be appreciated.

I replaced the front left wheel sensor and problem solved, this sensor controls the navigation speed, abs and asc lights gone.