As I understand it, auto levelling only actually kicks in when there is a heavy load in the boot

This is what the auto levelling function is designed for, to adjust for different loads and ride heights.

Although the system does react to bigger bumps/undulations in the road, it doesn't really stop the beam from going high and dazzling.

The whole "after market HID in reflectors" debate has been done to death over on the Fabia forum. My opinion is that as long as the beam is adjusted accordingly when the HID's are installed then I can't see the problem with reflectors.....there are plenty of cars on the road with high aim on low beam (especially on nearside headlights) which dazzle.

As for the MOT situation.....most owners on the Fabia forum are still finding the after market HID's are passing MOT's with no problems.

thats not how auto leveling works. Auto leveling is hooked up to the suspension so its working 100% of the time and works in real time with the movement of the car.

If you have oem hid's you can see it working when you are driving

I can see my OEM xenons adjusting constantly as I drive, particularly over sleeping policemen and uneven country roads etc.

This is what the auto levelling function is designed for, to adjust for different loads and ride heights.

Although the system does react to bigger bumps/undulations in the road, it doesn't really stop the beam from going high and dazzling.

Yeah that's what I thought.

as i said chaps, it doesnt work like that. It works in real time constantly changing

Edited 3 February, 201313 yr by ryan-re

as i said chaps, it doesnt work like that. It works in real time constantly changing

Some people think factory HID's adjust when you go up a hill so as not to blind oncoming motorists. Not true.

They sense the ride height and nothing else. When driving over bumps there is a slight lag in the adjustment so they don't really adjust fast enough to stop the beam going momentarily high.

You must have noticed this with your HID's?

Think about it logically for a moment, it HAS to use the info from both the front and rear sensors at the same time, otherwise when you go up a steep hill it would dip the lights so much you would not see anything in front of the car, and when you went down that hill they would blind everyone.

With the information from both sensors the car knows when you have a heavy load in the rear, a car full of passengers or you are simply going over rough ground / sleeping policemen etc, keeping the xenons nice and level.

Some people think factory HID's adjust when you go up a hill so as not to blind oncoming motorists. Not true.

They sense the ride height and nothing else. When driving over bumps there is a slight lag in the adjustment so they don't really adjust fast enough to stop the beam going momentarily high.

You must have noticed this with your HID's?

there is a slight lag but this is so slight its hardly noticeable imo