W205 Daytime Running Lights not working (left side)

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KiwiPete

New Member
Joined
Jun 23, 2020
Messages
13
Location
Corsham
Car
C200 W204
Hi Guys

I am getting the following warning messages in my C350e W205.
'Left Daytime Driving Lamp' and 'Front Left Parking Lamp' warning messages on the dashboard. I think they LED lighting strip functions as both?

When I use the ICarSoft diagnostics I get the following 3 'current' messages:
  1. The output for the daytime running light has a malfunction. There is a short circuit to ground.
  2. The output for the standing light has a malfunction. There is a short to ground.
  3. Communication with the control module 'Multifunction Camera' has a malfunction.
I tested the LED units by swapping it to the RHS and the unit worked on that side so it is not the LED lighting unit itself.
Do these error codes point to the main lighting module failing, or could there literally be a short somewhere.
Or could it just be a fuse?

As a note: I have just had the air suspension valve block replaced which sits very close to the left hand headlight unit, so maybe something wasn't put back right?
My suspicion is that it is a failed left hand lighting module,

Any thoughts, insights or experiences would be much appreciated.

Many thanks.
Pete
 
Strange they both gone at the same time… (if indeed they are different lamps but perhaps they are one and the same?) which like your saying sounds like more of a control module issue perhaps (or maybe stuff just not put back correctly after the recent work you mentioned).


Probably a futile suggestion but in this instance have you tried clearing those codes and seeing what happens… presume all three just reappear?

Edit: Not sure about your car but I think some cars have more than one ballast per headlight unit - if easy enough - might be worth checking by swapping all the ballasts RHS with LHS to see if the fault follows
 
Last edited:
Strange they both gone at the same time… (if indeed they are different lamps but perhaps they are one and the same?) which like your saying sounds like more of a control module issue perhaps (or maybe stuff just not put back correctly after the recent work you mentioned).


Probably a futile suggestion but in this instance have you tried clearing those codes and seeing what happens… presume all three just reappear?

Edit: Not sure about your car but I think some cars have more than one ballast per headlight unit - if easy enough - might be worth checking by swapping all the ballasts RHS with LHS to see if the fault follows
Hi Continental, thanks for your reply,
Yes I cleared the codes and they did reappear, I got a different error code when the LED module/bulb was disconnected though.

I believe both the DRL and the standing/park light are both connected as they both use the LED lens. The module might change the intensities depending on which one is operating which is may be why getting the same error code for both. The camera module message is interesting though, maybe this has something to do with measuring outside light levels so the module knows how bright to make the DRL.

All feels rather complicated to me. : -(
 

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