most Seats require a ariel booster.
you can buy them from your local halfords about 6 quid, which is a universal booster. this usually does the job and gets most popular stations, however is this still doesnt work, you will have to buy the seat car specific booster (usually ordered in depending on halfords store size) bout 8ish quid.
I really do doubt its your radio, i have had Panasonic JVC and SEAT headunits in my cars and none of them have ever needed an aerial amplifier. It is quite common for the beestings to go especially at this time of year due to the poor weather.
If your car is a GTI or Cupra then there should be a pre-fitted cd changer cable so if your reverting back to a SEAT headunit go for the Grundig one with a 6 CD autochanger on it
yea the aerial plug is covered in black fabric tape and you dont seem to have it in that photo... its pretty obvious when you see it... might have just fallen down the back of the dash somewhere
That blue wire on my fat leg is the radio connector. I need to rewire it into a connector somehow.