[IT]

This has cropped up before, and it was on my new car.

Comes up in the DIS showing as a headlight warning. Annoyingly, I forgot to photo the warning, before I fixed it <doh>

Ths history is that Xenons are that much brighter, that pointing them in the right vertical plane seems more important. I'm not sure whether its a regulatatory requirement, or just a nice thing to do, but D2's in the UK have a sensor on the n/s front suspensioon arm and n/s rear suspension arm so that can compute the pitch of the car, and adjust the headlight accordingly so as not to blind anyone.

Spiffing. Until it breaks that is. The system has two very simple looking connecting rods connectod to the two nearside suspension arms which go to a servo-looking device, which measures the angle and in simple terms feeds it back to the self levelling module (bottom of drivers side B pillar in UK) which in turn moves the headlights up and down.

If that warning is coming up, its most likely 1 of your 2 sensors is broken, followed by the control module itself.

I changed the control module as that was easiest, and it wasnt that

So, dug a bit deeper, and Vagcom has measuring blocks available for the levelling module that gives voltage readings for the sensors. My errors logged indicated a short to plus on the front sensor, which was reading 4.67v, where the rear one on level ground read 1.97v.

So, I robbed a the whole module off the s8 on my drive, swapped it over and performed the calibation routine detailed here:

http://wiki.ross-tech.com/wiki/index...(Dynamic_Light)

Basically - you goto basic settings and select 001 - This puts the lights in level position - Then you do any manual changes requried on the headlight lenses themselves - Then do a 002 basic changes and it saves it....

Heres a photo of the sensor in place on the front n/s suspension. The red circle is where the clip disconnects from the lower arm, the green circles are the two allen bolts that hold the bracket on.... Really easy change over