Audi A4 Noisy Driver's Window Glass

I was asked to have a look at an Audi A4 with a noisy driver's window recently, the window emitted a metallic grinding sound when opened and closed.  From other reports on the Internet it appeared that a replacement drive mechanism was the cure. This involved a complete strip down of the drivers door.

The cable driven mechanism was replaced with a new Audi part, see below, and the door reassembled.

Total time for the job was two hours and after reinitialising the one shot we now have a smooth, quiet driver's window.  Investigation of the old winding mechanism revealed the source of the noise; the cable inside the spool had a kink which was fouling the rest of the cable as it wound up and down. It was also wearing the nylon outer spool.

ELM327 Bluetooth Vehicle Interface

Just tested my new interface connected to my Golf MkIV.  Works fine with my new Samsung netbook running easyOBDII software.

No DTCs were available to read but I'll update when I use it for real!

VW Polo Brake Light Switch

I was asked to investigate a problem on a 2003 VW Polo with a EPC warning light permanently on. On investigation the brake lights did not operate either. There was 12V from the brake light switch with no load but not when the lamps were connected.  The switch was replaced and after a couple of brake pedal actuations and ignition cycles the lamp went out without need for the diagnostic kit.

The old switch was examined and the contacts were pitted and well worn!