W205 Headlight,is this sealed or can bulbs be replaced

[zaen1]

Hi all, could anyone tell me if the headlight on the W205 is sealed as i need to replace the indicator and drl bulbs but can,t find a way to get to them as the back part of the headlight looks sealed. Any help would be much appreciated . Thanks in advance

 

[DSM10000]

What does the handbook say?

Bulbs are replaceable but if LED they rarely fail. You might have a problem with a control unit. Do you have a local Mercedes specialist you can get to perform a diagnostic test?

 

[zaen1]

The actual headlight is still working like the main beam,just the indicator bulb and parking bulb have gone out but the headlight looks sealed from behind,not much info in the handbook

 

[Vulture]

The DRL module can be replaced, not sure about indicator LEDs though

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[zaen1]

Thanks mate, i,ll give this a try and see what happens

 

[P6YYM]

Thanks mate, i,ll give this a try and see what happens

I’ve the same problem, have you sorted this mate?

 

[paulr7]

I’ve the same problem, have you sorted this mate?

The ballast that Vulture linked is responsible for both DRL and indicator, if both of them are out for you then changing the ballast will most likely resolve it.

 

[richard]

LED control unit on headlamp probably especially if both failed together.
.
You need to be *really* careful if using used parts here. Part of installing a new part is to code the control unit to the headlight which you scan the barcode on the headlight which tells the control unit how much power/voltage/current needs to be sent to the 4 different channels it supports. Get this wrong and you blow up the LEDs in the headlamp because the are fed too much power. The same part number control unit is used on multiple lights. If you use a used unit, it can send the wrong power down and blow up your light when you plug it in - some couldn't be recoded also.. - You also have to remove the headlight to get to the control unit, which means removing the bumper.

Ie. use a new LED controller, and you need someone with online Xentry diagnosis to do startup/coding before its all re-assembled or they can't get to the barcode any more!

Cheers
Richard