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Discussion Starter · #1 ·
Hello All.

I'm thinking of upgrading the low beam bulbs for my R171 135KW Model.

I have had a look at the osram bulb finder at Osram - Vehicle Lamp Finder but it is stating "There are several available technologies for this application. Please choose the right one for your vehicle."

The drop down menu gives me two options -

Halogen headlamp or bi-xenon.

Any ideas how I can figure out what i actually need here please?
 

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*Premium Member
2007 SLK55 AMG
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3,633 Posts
Do you have Xenon lamps? If so you should not need to upgrade.
If you upgrade to Xenon I think that is a Biggish Job?
Nightbreaker Bulbs (Osram) get very good reviews.
Check your manual for the correct type of bulb for your car. (H7?)
If you have Xenon you will definitely have Headlamp Wash if no Headlamp Wash - No Xenon.
 

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Founding Member 2006
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108,830 Posts
Your datacard will tell you whether you have halogen or xenon
Or you can look at them
 

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**Premium Member 2012 SLK55 AMG
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2,855 Posts
If you have Xenon headlamps you will also be able to tell by the transparent "gills" that light up with the dipped beam from the projector lense and you will have no manual level adjustment switch on the dash because xenons have automatic levelling.
 

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Founding Member 2006
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108,830 Posts
Get your free datacard. Let me say it again....get your free datacard :D :D :D

then you will know because it will say Halogen or it will say Bi-Xenon :D :D :D
 

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Founding Member 2006
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108,830 Posts
He now has his free datacard! :D :D
No bi-xenon listed and just says headlamps so standard halogen
 

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Founding Member 2006
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108,830 Posts
more trouble to go to bi-xenon HID
just get brighter H7 bulbs. they have em up to 6k, maybe 8k lumens
 

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Founding Member 2006
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108,830 Posts

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*Premium Member
2005 SLK55 AMG
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Bear in mind that, due to UK MOT requirements, if you upgrade to Xenons / HID I think that (legally) you also need to have self-levelling and headlamp washers... I don't know how closely these things are policed, but I'm sure that I've read that this is a legal requirement here...
 

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2013 SLK55 AMG
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1,901 Posts
Xenon upgrades to "standard" halogen lights used to be legal in the UK.
However, now they must be accompanied by self levelling etc. And if they are not they are an MoT failure.
TonyS
 

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*Registered
2010 SLK55 AMG
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205 Posts
Hi. I also had the rubbish "Can't see where I'm going" halogens. For 80 gbp I bought an hid conversion kit which comes with ballasts and xenon bulbs. It was easy to fit ( 2 hrs) good quality and my car passed the mot no problem in the UK. It's correct they should have self levelling and washers but most mot garages aren't bothered as long as the lights work. I've had the xenons for 18 months now and my advice is don't bother with so called whiter light halogens,fit an hid kit and you'll never regret it.
 

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* Founding Member #2
2008 SLK55 AMG
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19,485 Posts
Thank you all for your reply's. Would it be possible to take the full xenon clusters another SLK and simply switch the units over?
IIRC this is possible; however, may need coding via DAS.
Others that are knowledgeable may chime in soon.
 

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*DAS/STAR Premium Member
2005 SLK55 AMG
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4,038 Posts
Sort of ...

You'll loose the self leveling and washers (unless your car already has them), plus coding will be needed too ..
 
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