PP may be right that a "partial" Bi-Xenon upgrade is possible - Mercedes-Benz Forum
 
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post #1 of 2 (permalink) Old 03-14-2002, 03:39 AM
Birger
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PP may be right that a "partial" Bi-Xenon upgrade is possible

Hi,<br> <br> a bit further down there is a thread discussing a possibly cheaper Bi-Xenon upgrade offered by PP (Keith's message http://forums.mbnz.org/forums/W163/vthread.asp?messid=17996 onwards).<br> <br> While I think most people will prefer a plug-and-play solution to taking their headlights apart, I came across a German page describing how to retrofit (Bi)-Xenon units from a VW Passat to an Audi A4 - I guess it's more or less the same procedure involved with 'Xenonizing' ordinary 2002 ML headlight units.<br> <br> I've included a link to the article, which althought technical and German, is also illustrated:<br> <br> <img src='http://meckhoff.de/antworten/aussen/bixenon/BiXenon_1.jpg'><br> <br> There is, as you may see, quite a lot of precision work involved, and the author admits that getting the focusing/aiming right may be quite a challenge.<br> <br> But, where there's a will, there's a way!<br> <br> Cheers,<br> Birger
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post #2 of 2 (permalink) Old 03-14-2002, 11:26 AM
Keith
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Thanks Birger, heres a rough translation...

(You'll have to refer to Birger's site for images)<br> <br> Bi-xenon in the Audi C4 <br> <br> Xenon lens units of the new VW trade wind GP fit without large change work into DE Scheinwerfergehaeuse of the Audi C4. The change is briefly outlined in the following one. With further inquiries Mail to me mailto:[email protected]?subject=Bi xenon in the Audi C4 . <br> <br> 1. First one should note the origin illuminating zone of the headlights. I marked myself in addition to my white garage wall the individual zones (distance car wall 5m). That is very helpful with the later alignment. <br> <br> 2. Headlights from vehicle remove. Diminish in addition screen and if necessary nozzle for SRA underneath the headlights. The headlight can be pulled out completely with turn signal after loosening of the 4 fixing bolts forward. Cables from headlight and turn signal take off. The turn signal is inserted at the headlight casing only and can be taken off after printing of the rear locking nose. <br> <br> 3. Now the disassembly of the headlight follows: <br> a) <br> Rubber frameworks in front take off <br> b) <br> 8 fixing clips for tinted windshield lever off <br> c) <br> Tinted windshield remove <br> d) <br> Reflector frameworks forward take off <br> e) <br> Actuator for LWR through tricks (direction is imprinted) loosen, at the reflector unhook and take <br> f) <br> Reflector/lens unit at the two placing items ausclipsen and carefully from the housing pull. Afterwards the cables take off (notice allocation!) <br> g) <br> The headlight low beam lens unit by means of 4 screws loosen and completely infer. Since the reflector is very sensitive, one should use a soft document <br> 4. The xenon units have something other fastening spots and distances to the reflector. Therefore I bent and screwed threaded rods in M4 into pass form. With additional nuts/mothers one can stop and fix then the distance to the reflector accurately (see fig. 1) <br> <br> Â*<br> <br> Fig. 1: <br> <br> The lens unit can be stopped by easy rotating of the threaded rods accurately to center of the reflector. Should remain received an air gap between reflector and lens, since the lenses become nevertheless somewhat warm (see fig. 2) <br> <br> Â*<br> <br> Fig. 2: <br> <br> 5. Before the installation into the housing this must be easily modified: <br> a) <br> At the xenon lens record placing items for the left-hand traffic are available, these push to a prop in the housing. This prop must be sanded off something (do not abkneifen, the material is brittle and breaks easily). <br> b) <br> At the housing lower surface a suitable hole for the rubber seal must be bored, approx. 42mm. (see fig. 3 and 4) <br> c) <br> Additionally still another rubber seal for the cables of the control of the fluorescent lamp ballast must be inserted (see to fig. 3 blue and red cable) <br> <br> Fig. 3: <br> <br> <br> Fig. 4: <br> <br> 6. Before the electrical link one one must select which version requires: <br> <br> a) xenon headlight low beam and H1 high beam <br> b) xenon headlight low beam and xenon high beam <br> c) xenon headlight low beam and xenon high beam as well as H1 high beam <br> <br> I decided for version c). The controller attached in place of the old H1 low beam lamp (in the lamp box umgeklemmt, for later back armament), to correct polarity pay attention! I have the control for xenon high beam screen parallel to the H1 high beam lamp taped, also here on correct polarity note (see to fig. 3 yellow and blue cable). The screen opens now at the same time to the initializing H1 high beam lamps; there with DE Scheinwerfern the headlight low beam also with high beam continues to light up has one now xenon and H1 high beam. With headlight flasher the xenon burner, but only the H1 high beam lamp is not active. The screen opens also, since the burner is not however out - > a xenon headlight flasher. One can attach it naturally also with, but of it I foresaw. <br> <br> 7. The assembly of the headlight takes place in reverse order to point 3. The free movement of the reflector/lens unit is to be checked, so that the LWR can operate correctly (see fig. 5) <br> <br> Fig. 5: <br> <br> 8. The headlights again at the vehicle install. <br> <br> 9. The protections for headlight low beam of 2x 10 ampere are to be increased on 2x 15 ampere, since the xenon burners are more economical in operation than H1, in the einschaltmoment however more current pull. <br> <br> 10. Now the first light test and the headlights take place can be adjusted. Here now those comes completely at the beginning made wall sketch to the application. Evt. the available mismatching between xenon headlight low beam and H1 high beam can by rotating the nuts/mothers on the threaded rods (fig. 1) to be accurately adjusted. Xenon headlight low beam has an almost horizontal propagation, only in the center is an easy collection. With the normal H1 headlight low beam rises the light to the right page easily. The adjustment should be checked in the workshop!!! The LWR is to be checked likewise again. <br> <br> <br> 11. Since the xenon burners and their angle wall plug more workstation need than the H1 units must the housing back cover be adapted. I made this in the inserted status, since the space conditions are nevertheless quite scarce particularly on the driver's side, and a excessively turned out cover does not fit in. I sawed and with a plastic cover provided a suitable hole in each case into the old cover. This is sealed and painted with water resistant screeding compound and colour (see fig. 6) <br> <br> With further inquiries: Text and photo by Uwe Reil <br> <br> Fig. 6: <br> <br> 12. To the termination still the controllers and cables are fastened. <br> <br> Change 30,05,2001 by Uwe Reil . All specification without guarantee <br> <br> <br> <br> <br> <br> <br> <br>
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