Originally posted by psyone
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The light is designed with a mounting piece an lens and an LED strip. They all clip together and are mounted via the mounting strip.
Unfortunately, the mounting strip is EXTREMELY flexible, and the assembly appears rock solid because the mounting strip hooks into the lens.
Next, the lens mounting surface is flat, however the door/tailgate mounting area is curved. When it is installed, the tendency is to make it sit flush all around. This load is not taken by the mounting strip, but by the lens. The lens is permanently under stress.
Now all you need is some cold weather, and the hooks on the mounting strip pull down hard at either end (there are 3 hooks at each end). This causes the lens to crack in the middle, and then as it fails, the load is put on the ends which also develop cracks.
When all this happens, large parts fail at the mounting hooks and end up in the door cavity.
The lens is simply NOT designed for these loads. Even doing the screws up finger tight will see the lens crack. The only way to try and reduce the incidence of cracking would be to replace the light just finger tight on the coldest of cold nights where the Caddy, the light and the screws were all at the near zero temperature. Even then it is not guaranteed.
The thing is that VAG, VGA, and EVERY dealer around the world will know this is a problem, but they keep using the light because it generated revenue. If you get it done in Australia by a dealer, look at something approaching $200 (this is what I was quoted). If you import the light, it will be something under $50, plus your time to remove the cracked one and fit the new one. If you have a tailgate, you will need a stubby phillips head screwdriver. Then if you do not want to hear all the bits rolling around every time you go around a corner, you will have to remove the trim panel, vacuum out the remains and then re-fit the trim panel. Remember, this will have to be done every 6 to 12 months, depending on when you replace it.
I have a few days to kill, so I'm going to send the information to the Department of Infrastructure and Transport and the ACCC.
All the while, this light is covered by ADR60!
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