Radio code

[Dave12345]

I try not to use this site just to sort out my Fiat radio's, but garage recently disconnected the battery and the radio requires a code - it's a. Blaupunkt GMBH 815BP531860898018 Fiat Multipla MY CD/5803 7645318316 e1 022329 - there are more numbers on the other side
Can anyone help?