Hi I need the code for Blaupunkt Car 300 (F) car radio. Car radio went a bit funny - display not showing correct, then Battery went flat and radio died. now cannot get the radio to come on?

TYPE CAR 300 (F)
NO: 90 533 422

other numbers are
8 631 177 878
and also
8 635 132 821

can anyone help me please?

laus, April 2015