bi-xenon stopped working, DRLs flash on high beams
 

Hi everyone,

I'm posting on behalf of my dad, hoping to avert a costly trip to the mechanic for something that might be trivial. Seems I'm using the wrong search terms because I can't find anything about the problem he's having and this seems like it should be a well-known problem.

His W163 ML500 has bi-xenons and the passenger side low+high beam stopped working. When he turns on his high beams the inner-most light (DRL?) blinks instead. Is this a sign of a failed xenon bulb? Failed ballast?

Thanks!
Michal

First of all what year ML 500?

Secondly, are the bi-xenons factory installed or were they a modification?

If they are factory, I might be able to help you. If they were a mod, I can't.

They were factory installed.

Jesus, I asked two questions and only one got answered.

What year is the 500?

It's a 2004, Maj.

Bump...

There are a couple of things to check:

1. Fuse #20 in the right side kick panel fuse/relay box.

2. See that ground W2 is tight.

3. Also check condition of the control module and the wiring.

4. Try not to put the headlamp back as there might be other tests to perform. If there are, you will need a test light and/or a DVOM.

In the future, when you need help, don't take 14 hrs. to respond to a simple question (e.g what year is you truck?)

WOW! Tough crowd. Ohh your from NY that answers a lot.
Mike

Ok, I finally got my hands on the car. The fuse was fine, the other control box also looked fine. I took a look at the bulb on the passenger side since one lamp was already out, and it looked a little hazy so I swapped the left and right bulbs as a sanity check. Turns out that's the problem. My dad needs to find an honest mechanic because they had told him that they already checked that and the next step was electrical diagnostics. Now I'm just a little surprised that the manual doesn't say anything about the symptoms for a failed bulb.

Anyway, any recommendations for buying replacement bulbs? Roll the dice on eBay?

You seem to be sympathetic towards someone who failed a two question questionnaire and then" bumped" the thread looking for a response. These two questions were listed separately and not hidden or disguised in any way. Holding someone's hand is not my cup of tea.

Why you chose to go with this N.Y. thing can only be interpreted as you have a great dislike for New Yorkers in general. Being contentious as you are, would you have made that same remark if I lived in any other state?