mercedes blaupunkt truck low blocked

[servis.draza]

mercedes blaupunkt truck low
7620000022
815bp0022a1829740

radio is blocked and need code
can somebody help?
thanks

[momogsm]

HI
7691.............................................. ..

[servis.draza]

thanks for code but radio is blocked,I need to unblock dump

[irfa]

thanks for code but radio is blocked,I need to unblock dump
file reset..............same code

[mikemike]

Hi!Try power on,wait 1 hour.
I think code 1691(or 0691).(from s/n)