because the radio reception on the last trip was very bad sea, I thought, looked.
Today radio turned on and how should it be: good reception.

For this the engine of the antenna ran a good bit further, after it had already completely extended. The same thing when you drive in.

Then I tried to open the antenna to see where the error was, but I didn't get beyond the "telescope mechanism" (speak: to the engine).
Is there anyone who has experience?
Oh yes, is an original: 8A0 035 509 A.
Or is there an alternative that fits? Don't look through the various offers somehow.

Thank you for your answers!
Greetings,
Peter