Just replaced rear right door light that was out having been replaced 2 years ago under warranty. I have orders a “bulb” for the left rear as it’s a dim purplish colour a sign that’s it’s failing. I bought my bulb on EBay from Mercedes Newcastle £17.10 posted. Right side bulbs are the same front and rear code: A 099 890 02 83 for the left the code is: A 099 820 02 83.
It took me 45 minutes to do the swap so any garage chafing between £75_ £90 is a fair price. To do the job at home you need a torax 20 and 25 screwdriver the T 20 is only used for the door and needs to be about 10-15cm long. The door card has to come off there are plenty of videos on line for this. Next the door handle is removed again plenty of videos. The third stage is Remove the rear door module, which is basically everything inside the door. The prices involves removing a rubber inspection bung in the door and by using the drivers side switch lower the window about 15cm until a white carrier and screw can be seen. Slacken the screw to release window and pull the glass to the top and hold in place with strong tape over the top of the frame. The next stage is to remove the 2 bolts by the door lock and the 12 bolts around the door. I have read about drilling out rivets DO NOT do this. The rivet thing comes into play if the bolts had been stripped of their thread on previous strip down. The two in the middle hold the window mechanism and do not concern us on this job. Next step is to wriggle the black mount away from the door. I found I
Needed to push the door latch with a screwdriver to get it to slide out. With the two screws on the outside of the door handle loose the handle mount will also come away. In the mount you will see the lamp
Holder, remove the wire connector and push back two tags.
Refitting is a fiddle but take it steady and all goes back well things to look out for on refit: untape the glass and push it down into its carrier The screw should be tightened till there is light pressure the correct torque for this is: 6Nm remember it’s onto glass. I had to slacken the carrier and jiggle the Glas till it slipped back into its holder. You can use the drivers switch to test all is ok.
Rotherham connections are just a simple reverse of procedure. Do not forget the green cable to the inside door pull. And if like me when you rest the door from inside the the door pull does not work check that the child lock tab was not moved I had not checked this and on testing I thought I had forgotten the handle wire.
When putting the door card back on make sure the window is fully down and the sealing strip is correctly seated. Offer the card up from the top at about 45 degree angle to aloe the tabs to go into place, slot the window button in place then lower the card against the door and tap it home. Two screws back into armrest and it’s done.
To test you work cover the windscreen sensor lock then unlock.
Hope this helps. I am sure some one will be able to identify steps to explain this more clearly. If there are errors in what I have outlined please post amendments after all the forum is about sharing help and advice.
