The W123 chassis covers 240D's, 300D's, 300TD's, 280E's, and several other models of Mercedes coupes, sedans and wagons from model years 1977 to 1985.

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How do I detach the antenna box in order to disassemble it?

I tried to replace the antenna cord & shaft, but the motor won't grab hold of the toothed cord. So I bet there's a bit of the old cord stuck in the motor. But I can't figure out how to get it out of the car in order to use the (excellent-looking) antenna disassembly manual. This is a 1985 300TD. Thank you!

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It should be held inside the car by a bracket with a screw. Remove that first. To find this bracket/screw you'll need to pull out the plastic panel that covers the antenna motor inside the trunk, in the driver's side wheel well.

Then, you need to loosen the nut that holds the antenna in place on the outside of the car. It is sort of hidden, as it looks like it's not really a nut. Shown here is an example below:

Block Image

See that part with a flat side just below the tip of the recessed antenna? That should unscrew, using the an open end wrench of the correct size.

Now, it's good to know there is another style of nut that you may run in to depending on your car. Instead of a flat portion to get an open end wrench around, you may instead find two "slots" in the nut. This kind needs a special spanner wrench that fits over the tip of the antenna. Or, alternatively, you can carefully and slowly "tap" the nut off with a punch and hammer. Just use the punch to tap the nut in the direction it would turn to loosen. Lefty loosey!

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Does your solution also work on a 1982 240D?

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