Cheers guys thanks alot for the help. I've had this problem for as long as can remeber. It hasn't worked properly ever and I've done the updates whenever new ones were available so I feel that I've tried everything off the top of my head. My current version is the 9.1 version (V.291 I think its called) so Its up-to-date. When I got to the service menu one can see that all the diffrent pulses etc. have figures attacheds to them that are changing constantly. But the wheel sensor shows negative figures when going forward and positive when moving bakwards, is that suppose to happen? Maybe Its the wheelsensors not working properly because the gyro seem to working, one can see that it turns when turning the car. In tunnels the GPS switches to the wheelsensors and It follows the actual position quite well but its the combination of the sattellites and the sensors that delay the cursor when positioning! As told my receiver, the small black "puck", was retrofitted and is aftermarket. Should I try with a OEM one? Thanks for the help guys really appreciate it.