My friend has a very nice 500E, and is looking to replace the RADIO 10 CD in it with the original. He does not have the original so is looking to buy. After checking the VIN number and checking codes and pricelists it seems like the standard radio that came with the car in 1991 was a Becker Mexico 2000. Anyone of you that can confirm that? No codes say anything about radio or audio so therefore i believe it had the stock basic radio.