you must find the twenty pin obd connector located under your hood in the engine bay, normally near the right side firewall area. unscrew it and see the center plastic alignment pin, it looks like a...
This is for Push Button Start E60 models only..... Put 'key' unit in ignition. Leave car in gear and push the Push to Start Button ONCE. Don't worry, car will not start. This is called position 15....
To reset the oil service light open your hood and find your diagnostic connector. Its a big black plastic round short piece on the drivers side of the motor to the front. Unscrew the cap and look...