- Mercedes-Benz C-Class: How to Install Illuminated Door Sills
Step by step instructions for do-it-yourself repairs
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Illuminated Door Sills Inverter




I bought my illuminated door sill kit used and the seller told me he lost one relay and bought another one, and it ended up having a different part number and the relay is green instead of black like my other three. From y photo records, I don't have a complete part number, I can only make out the last five digits which are "86 6 89."
A204 820 49 85 (control module)
A204 820 00 04(wiring harness for control module)
B6 602 1063(right sill)
There is another wire that connects to the sills and inverter but it does not have a part number.
xxGenericSNxx I think I saw your seller's thread and got a part number B66890126 but the dealer couldn't find this part. I also found another part number B6689139 from the S-class forum. I'm not sure if I can use that but the dealer managed to find that in the system.
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Thank you so much for the numbers! I took a look at them and unfortunately the inverter/ relay is not in there. I think it should be similar to this: B6689XXX. I guess I'll just take a risk and order B6689139 from the dealer. Hopefully it is the right one.
It would be helpful if you posted the parts numbers of the parts you already have... I don't think its possible to order that part that starts with a B its not a standard parts number as such.
Ill review the WIS for installation instructions to see if I can find out anything more.
I am new and in the same situation...Drivers side is not lighting up. Was told by the dealer they removed it and hooked it up to the passenger side and it lit up.
Do I need just the relay kit? and if so - what part number is it i'm looking for?
Dealer said i'd need the whole kit for $1,2000. Definitely would like to avoid that!





