should go between approx 87 and 108 on FM, assuming you're searching frequency and not presets..... If not there must be something wrong ?
Unless it's an exotic japanese radio, think they use 76 - 90 .....
I know the Blaupunkt radio's have the option to switch between South American setting and European setting..... Perhaps that will work ??
Mode for europe / south america (n.b.: information not contained in owner's handbook)
The two modes can be activated in sequence by pressing BN (band select) and preselection button 1 simultaneously within 5 seconds of switching the radio on. The mode selected will be displayed on the radio for 2 secs.
_ E U R O P E _ (RDS side)
S U D _ A M E R (RDS side)
Depending on the age of the car might be easier to just change the head unit. If its an older Alpine original head unit you will need the code with the unit. Codes for the later Blaupunkt head units can be obtained from this site.