Another w203 with remote locking problem


Oct 31, 2020
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Your Mercedes
2003 C 220 cdi coupe

I am new owner of Mercedes Benz C 220 cdi Coupe (W203).

I like the car but I have a problem with remote locking.

If I place the remote key fob near (1-2 cm) the driver side door handle sensor It works.
Radio FM signal is also very poor, almost no signal at all.

Fuse 8 is OK.
Tested both keys, both show signal on the camera.

So after reading few threads here I think my Aerial amp is faulty.

Can I test or measure it somehow ?

Thank you for any help.

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