If it's the same as a 328, you have to take off the interior panel and sound deadener, then with window up and a helper lifting outer door handle for a better interior view, you can see a very thin piece of metal near the key lock which you can slide towards the front of the car with a long screwdriver. Kinda hard to see it, but if your in an uncomfortable position, your close. It is almost behind the glass. Use a good light. It slides pretty easy and the outer cover will about fall off. Don't slide it too far or it's a bitch to get the screwdriver back on it to move it back into place.