coding seat sound system?

Hello,
I replace my MIB2 (with seat sound system). Everthing is ok (the seller code it for my car)
But with my new mib, i lost the settings of sound system (i think the seller forget this setting).
Is it difficult to add i and code it?
Thanks
I replace my MIB2 (with seat sound system). Everthing is ok (the seller code it for my car)
But with my new mib, i lost the settings of sound system (i think the seller forget this setting).
Is it difficult to add i and code it?
Thanks