VW Golf V Battery Power Lost

Hello AP members,

I want to put a Radio RDS310 in a Volkswagen Golf V with originally a RDS300 from factory.
Now I know that this gives some trouble concerning voltage drop from battery.
I heard that it is possible to reprogramm the gateway to avoid the power loss of the battery.
Somebody here has some experience on this issue or is it?

Regards.
t5golf