Blaupunkt Mannheim Radio 12V

Used Blaupunkt Mannheim 12V radio and not working very well. I tested it with 12V and the radio stations are not easy to find. It runs and finds radio stations, but not as good as it should. All switches and other functions are ok. The knobs are working and both rotary control switches are working. On/Off function is also ok. The face plate has one small dent which you see at the last two pictures at the top chrome area about 3 cm from the left knob. The size is about 17,5 x 12 x 4 cm. The radio was made by Blaupunkt Werke GmbH in Germany.