Hi fellow isolators, I am new to this site and this brand of car, I bought the Audi last July and have been using it as a taxi on a circuit in my local town having had Ford Mondeos as my last three cabs and I have racked up best part of 820,000 miles between them, the Audi has been a bit of a revelation, its far more reliable than the Fords ever were
I now come to my first problem, last week when coming home from a friends house I noticed that the nearside beam was illuminating the floor about ten feet in front of me whilst the other offside beam was normal, when I got home I parked at a suitable distance from the garage door and noticed that only the offside lamp was going through the levelling routine the other light remained stuck in the downward position this is where it all gets confusing.
Having done extensive trawling on the net only made it worse, some say its. the light range control module under the dash glove box so pulled the Dash apart that side only to find just the airbag canister and nothing more, tried the other side as well and there was nothing remotely like a light range control module with a blue plug, then onward to the levelling sensors on the back and front, I found the rear sensor ok all attached and correct, then off to the front which did not seem to have a sensor on either side, had the splash guard off to see if the previous owner had disconnected it and slung the connector under the engine again nothing.
In the end after multiple scans with VCDS, Snap on, Delphi and Maxiscan, still no codes!, I finally got round it [Bodge] by using the VCDS headlight position relearn and adjusting the unit manually then doing new values function but again its only the offside unit that does the self alignment sweep but at least the beams are level, when I first bought the car I enquired which main beam bulbs were fitted to my car and was told D5S these bulbs have the ballast built in which negates the need for a separate ballast control, on inspecting the offending light there is a ballast control unit bolted to the side of it, again research has two conflicting theories some say it must be a D3S set up others say its there for the DRL, oh well just have to skip the back cover off and read the bulb rating off the back. so does anyone out there know what propels the levelling absent a front sensor, does it all work off of the rear sensor?, I have another theory that it may be the stepper motor in the unit playing up, deep joy if its that as either way the front bumper comes off and I can't seem to find a part number for the motor and the bumper removal looks a daunting task, any advice greatfully received