Very common problem with W204s. I had to replace both sides on mine, more than once! Happy Baby Jeebmas sir. 👍

Mines gone in the exact same place. Great vid, thanks for the help

Another technical masterpiece Sir Tim 👍

I have just sorted this on my mate's Mercedes C220 W204. The total draw on all of these bulbs if they were to be on simultaneously is 9.4A. The 5 large bulbs draw 1.8A each an the 1 side lamp bulb draws 400mA. So you're not going to have any issues with the individual lamp circuits fro a current perspective. But how likely is it, you might ask, you're going to have all of the lamps on at any given time? Not likely. So I don't think it's necessarily a matter of under spec cable for the ground wire. It's not like they all have this problem. If it was you would expect the same issue on the other side of the car. In my mate's case it is just on the left cluster. I think the problem is the crimping on that wire. Too tight. Squashes the copper to such an extent that it reduces the cross sectional area of the cable and therefore dramatically increases the resistance at that point and thus the heat damaging the cable. So I decided to upgrade the brown ground wire to 20A cable and solder the connector to the cable instead of crimping. Just on that cable. I then spliced that new cable to the original brown cable using a WAGO splicer which is good for 32A. Probably a little bit of overkill. A decent crimp on the original brown wire would probably be fine. I just wanted to make sure it didn't happen again given it's my mate's car not mine. Anyway. Thanks for the video.

Good work. This'll help. I need to switch the side of my fog light. Just got to work out which wire it is now and how I can extend it and run it to the other side.

great video as usual ,,, often in that situation I take a picture of the part before I start , it makes a handy reference if you need it further down the line ,,,, also on a technical point , your not meant to twist the wires before you crimp them they are meant to go into the connector straight ... its to do with creating peaks and it messing with power transfer or so Im told , it was an aircraft tech that told me ,, I twist them too though. Happy New Year.

V.helpful ...my left had side cluster had just gone - thought it might be water related (given recent storms). Now noticed that its a burnt earth on left. RHS was also burnt but someone has previously rewired that. I have a 2nd mercedes of the same model, so will check that also. But good to know how to fix. 👍

Another video out there points out that the burned ground wire is a common problem. The brown wire is too thin for the current it carries, so it's likely to burn again (in time). He supposedly created another video showing how to replace that brown wire with a larger gauge and ground it elsewhere (I haven't found it).

Dieser Mann hat Geschmack!

Nice video pal. Is it worth grounding the new unit to stop this from happening again. Looks like a common fault/design fault. The wires are too small for the a current. When I ordered new unit that was fine around 38 quid. But the spade connectors came with wires as they said they don't sell the connectors separately. This cost me another 36 quid just for that. Was very upset. The connector block was around 3 quid. Nice that unit comes with bulbs. Now I gotta solder the new wires as not spades we're supplied separately and too long to decrimp. I will follow parts of your methods. Nice one pal. Also I emailed Merc to see if there were any recalls as this is a common safety fault. I just received a recall for the airbag unit.

Replaced mine but rear lights and brake not working... Fuse for those doesn't seem to be on the fuse diagram either.. weird one

Thanks for this video, I just wanted to confirm if it’s possible to pull the pins from the old connector and plug into the new connector. And then just fix the earth only instead of cutting all of them and crimping them before fixing them to the new connector. Thank you

What’s the name of the black piece itself ?

Can you not just unplug plugs from the adapter and only wire the earth wire ???

I have no reverse lights on this model c180 2008 manual gear box, the swich for reverse was change and steel no reverse lights, any fuse ore cable issues? Thanks

Same issue with my W204. Where did you order the OEM part from please?

Very helpful video, Amigo! Where do you normally buy parts from ?

Do you have to disconnect the battery for plug work, or wait till all electrics go off?

Hey firstly thank you for the video, i have exactly the same problem. Where did you buy the replacement stuff? Or at least could you please tell me what the exact name of them are.

I did what you done replaced the whole thing with pin and passenger side top light is flicking on off any help on this ?

Hi, is it possible to change the entire connector without having to worry about rewiring the connector?

What exactly was that orange tool you used to cut the wire?

I just soldered some house hold mains wire from that earth on cluster to body earth and never had it happen again.

Hi there I’m having some trouble sourcing all the parts in the video, would you mind listing all the parts I need to order to sort out this issue please I’d be very grateful as I have the same issue on the same back rear right of my C Class, many thanks

Hope you hoovered up the debris left in the boot ??

The ground wire is way too small, l the gauge that is, so a thicker wire is needed to handle the amps otherwise it over heats and starts to melt everything. Soldering a new brown, earth wire will remedy the issue.

Hi were you getting a warning light on the dash regarding this issue ? Thanks

Is there any way i can do this with out b crimps?

Hi there I have the same problem with my Mercedes can I bring it over to you? Where about is your garage. I'm in Manchester.

we're you get the parts

Can anyone tell me what size crimpers I need for this? I bought all the parts and a pair of crimpers but they are too big.

Where did you buy the Cluster by chance? I can't find it in Australia - is it only a place in Europe/UK that sells?

Tim i need mines doing but don’t know who to got to

Is it the same for the led/facelift model?

Very helpful, where did you purchase the parts from?

Where did you get the light kit from?

Would this help on a 2010 c300 left side?

just the video i needed, thanks for uploading this, you wouldn't know how to remove the chrome grille on a 2008 clc 200 coupe would you lol?

Would love to get the connecter part #

What is the part number for the connector?

Does anyone know the part number to the wire connecter A 01 3450 7?

Where do you get the crimpers

do you or anyone have a link to where i can buy the product

I replaced mines but didn't fix so I'm thinking it's the fuse now but can't find which fuse and where. Anybody know? Left brake lamp.

There is a recall on that

Same issue same side identical damage...Bingo!

How do I de pin?

Not as well built as the Citroen C1 pal👍