W639 Sidelight/DLR LED Conversion - Mercedes-Benz Forum
 
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post #1 of 1 (permalink) Old 05-31-2019, 09:08 AM Thread Starter
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Date registered: Oct 2012
Vehicle: 2013 Vito 113CDI
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W639 Sidelight/DLR LED Conversion

Hi,

Apologies if this has been asked before but I did search and didn't see anything obvious!

Has anyone on here replaced their W639 Sidelight/DLRs with LEDs successfully? I had a go by getting a set of these:

https://www.ebay.co.uk/itm/382734891574

However, they don't come on with the engine (as DLRs) and when I turn the lights on now I get a warning that my parking light bulbs aren't working (even though they are).

So I'm thinking that I have 2 issues:

1. The original W21 bulbs are dual filament and so have separate filaments for DLR and Parking/sidelight function, whereas the LEDs only have a single set of terminals for on/off.
2. The CANBUS can't cope with the lower load of the LEDs and is throwing the error regarding parking light bulbs.

I've had a look at the various CANBUS resistors/converters available, and I'm going to need something that has a 3 wire input (for DLR and sidelight) but only 2 wire output. Has anyone used anything like this before, or is there a simpler solution (like a different LED that has the sufficient resistors built in).

Alternatively should I just give up and use an old-school bulb?!!

Thanks,

-Gordon


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