As these lights are already designed for the car, I assumed that when I said you need to change the lenses to use xenon bulbs, people would use the complete units already available, and not fabricate their own.
So, am I right in saying that you could take a complete E marked factory fitted HID set up (Ballasts, headlamps and bulbs) from one 147 and fit it to another, and that it is the only way you could legally fit xenons to a 147?
Because that is what I was trying to say in my original post. Perhaps I should have been a little clearer.
Yes you are correct, only by changing the entire headlamp unit is it a legal installation. Sorry about any missunderstanding, however if you had seen some of the things people had done to lamps that have then been returned to us under warranty, you would understand why I did not assume that you meant by changing the lens you meant changing the whole lamp.
The reason this part of the discussion arose is because in several other threads people have brought up the subject of HID upgrade kits and made all sorts of statements about how they can be legally used. I was just pre-empting that discussion. I personally don't care if people choose to use illegal stuff on their cars, its their insurance that will be voided if they have an accident and the stuff is discovered, however I do not want people to be missinformed about what is and isn't legal. If they then choose to put illegal stuff on their car then that is up to them, but atleast they do so knowingly. Its all about making informed decisions, and not putting forum uses in an awkward position if they are then accused of providing information that is wrong.
If I am not mistaken, and I possibly am, it is illegal to fit HID lights to a vehicle that did not have them fitted as standard! There are more things than just the lights, the lights must also be able to adjust as you drive, automatically, and if the auto system fails, the lights must return to the lowest level on the road. They must be adjusted from front and rear axles, and they must have a system of cleaning them on the run.
Why would anyone want them anyway? I had them on my Laguna, very bright, but the light stops about 20ft from the car, there is no carryover! The lights on my Sportwagen are brilliant, far better than the Laguna and that is without any uprated bulbs.
The whole issue of levelling and washing is a requirement of the Lighting installation Regulation (ECE Reg 48) for new vehicles. How it applies to in the field upgrades no one seems to know, However I would air on the side of caution. By the way, if you only had 20ft of range on your Laguna headlamps then they were aimed badly. Visible range is governed by the aim of the lamp, not what technollogy it uses.