Willem , i think the best way to check the steering angle sensor & edc sensors would be with a scanner that has the capabilities of reading the data. Over here in the States the best choices are Autologic , A GT1 or BMW'S ISTA.
Im not sure why you would want to check these , are you experiencieng any problems? Usually the car does it's own diagnostics & will let you know with an illuminated dsc light.
Im not sure why you would want to check these , are you experiencieng any problems? Usually the car does it's own diagnostics & will let you know with an illuminated dsc light.