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· Registered
1 Posts
Many thanks for this info: Managed to complete the job by just by working on the Torx screws & removing the six clips nearest the boot latch. This gave enough room to pull the boot lining down to access the two nuts holding the light to its bracket.
Costs of the replacement would be reduced if the old light bracket was reused.
Thanks again.very generous of you to go to so much trouble on our behalf.

· Registered
9 Posts
I have found a new website that I order all my Genuine Mercedes Parts from.. they are by far cheaper than your local dealer. I have always gotten the parts fast and exactly the same as what the dealer would give you. If you have any questions about part numbers etc.. call them and they can look them up by your VIN... this part is $121.60 on their site...

Sometimes the part numbers don't match what your local dealer gives you.. that is why I always call this place and verify the number first.

Genuine Mercedes Parts

· Registered
2004 CLK 500, 2011 C300 4Matic
74 Posts
As eleceel said, is the least expensive. In fact, $85 is dealer cost.
I've yet to find lower cost for new, OEM Mercedes parts anywhere else. I used this web site to order all the parts I need for my CLK and was very satisfied.

· Registered
4 Posts
thank you so so much for the clearly instruction on the 3rd light replacement and help me to save 100 buck for the labor from MB!i was changing mine under ur instructions,it very easy and cost me 15 min to do it!!thank you so much!!best regard!!cheers

· Registered
2 Posts
Mine just fell off yesterday, and then got run over in the street...

I called Mercedes today (in Vancouver), and they wanted:
$280 for the part
+$100 labour
= >$400 ?!?!

Ridiculous. I'm looking online for alternatives now. And I'm going to do the install on my own.

· Registered
CLK 320 coupe 2005
2 Posts
I am also in trouble of fixing my third break and I am in a small town texas, the dealer want 110 for the labour and 180 for the light, so I ordered one today for $101 +$15 shipping and see if I can do it myself~~~~~

· Registered
2005 CLK500 coupe
19 Posts
The third brake light is a poor design - surprising coming from MB.
The problem is that the arrangement of the assembly contributes to its own
destruction (something like the Third Reich).
If you look at the arrangement, you'll see that the spring bracket actually
hangs on to the threaded studs coming from the rear of the plastic light
assembly. Every time the trunk lid is slammed down, the inertia of the heavy
metal bracket tends to force the rear of the assembly down, eventually
causing it to fail.
I have devised what I think is a solution to this problem.
The lowest price I have found for the light assembly in the U.S. is from for $91.20 plus shipping. My MB dealer matched this price (and
ignored the shipping cost).
After removing the old assembly, be sure to clean the lip of the opening in
the trunk lid. This is where the adhesive gasket of the new light adheres to the lid. Use naptha (lighter fluid), Coleman fuel, or mineral spirits. You should note that the light fits properly only one way. On mine, the part number/writing on the back of the light went in upside down.
Next, remove the paper from the gasket and insert the light into the
opening. While holding the light assembly in from the outside of the trunk, apply
silicone RTV (I used clear, but any color will do) liberally around the
perimeter of the back of the light assembly inside the trunk. It helps to have
the use of someone's small fingers to force the stuff on to the top and
Assemble the metal bracket to the light with the two nuts. This ensures that the light is positioned properly in the trunk lid. Try not to get too much RTV on the bracket. Leave it this way for about 24 hours to allow the RTV to cure.
Now remove the nuts and carefully remove the bracket by pulling it
rearward. It will have been glued to the rear of the light, so you might need to use pliers to do this. Be careful not to rock the bracket up and down too much so as not to break the adhesion of the RTV to the trunk lid and the light.
Now apply more RTV around the perimeter.
Allow another 24 hours, then reassemble the trunk lid parts.
What you have done is glued the light assembly to the trunk lid. The RTV
acts as a glue, seal, and shock absorber. It is a somewhat permanent
solution - the LED's will likely outlast the life of the vehicle. If the light is
damaged, it can still be replaced beause the RTV remains soft and can easily
be removed.
Any good RTV can be used. I used the type that comes in a cartridge that fits in a caulking gun. It is also available in squeeze tubes.
You might be tempted to leave the metal bracket bolted to the light assembly, but it really is not necessary because the light assembly is not very heavy and the RTV will hold it very securely.
Although this procedure sounds time consuming, it will likely preclude your ever having to buy another expensive third brake light.
If you experiment a few times, you'll find that it takes very little downward force to close and latch the trunk lid. This will also preclude damage to the light no matter how it was installed.
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