How to Adjust Xenon Headlight Range
using a VAG-COM
I can confirm that this tweek works on an '01 TT
225 and '03 A4 Avant 1.8T. Although I have not tested it, this should work
on all current Audi cars with OEM self-levelling Xenon lights.
When I recently took delivery of my '03 A4 Avant 1.8T, I noticed
that the headlights were aimed too low. Foreground illumination was
excellent, however I was having difficulty picking out signs further down
the road. They were certainly not aimed as optimally as the Xenons on my
TT (after several trips to the dealer to get it right).
When I
parked the A4 alongside the wall of an industrial building at night, a
sharp downwards slope was evident. The lights were aimed approximately
20-30 degrees from horizontal, too low for my taste.
Here is the
procedure to adjust the vertical aim of OEM Xenons
1. Park the car
on a level surface, 10 to 20 feet from a wall if possible. Connect the
VAG-COM as usual, with both ignition and xenons on. 2. Select control
module 55 - H. Light Range. This is somewhat hidden under "Less Common
Modules" 3. Take note of the value in the Soft Coding cell. This is
the headlight level as set by the dealer when they performed the PDI. If
you manage to muck things up you can always go back to this default value
4. Click on "Recode - 07" and you will be able to modify this soft
coding value. A smaller value aims the lights higher, and lower value aims
the lights lower. Click on "Do it!" to see the lights move up or down.
5. Don't over do it. I suggest that you choose a value that still has
a gentle downwards slope to avoid blinding other people on the road. I
changed my original value from 00060 to 00020 and it's perfect. 6. Now
you need to recalibrate the self-leveling reference point, or else you
will throw a code the next time you start the car. 7. To do this,
select "Basic Settings - 04" and scroll up to "Group 001". In a few
seconds the first cell will change from "wait" to "set". Now scroll to
"Group 002" and wait until the controller says "Learned" 8. Enjoy your
improved visibility!
- JohnLZ7W 2002-12-16 17:48:07 (148 views)
- TTschwing 2002-12-16 18:14:41 (329 views)