Apologies in advance, I know this has probably been done to death but...if I buy an SD card from a mate which has an activation code with it do I still need Audi to activate it? I've got a 1.6sportback with the MMI and Nav ready pack, box in glove compartment. If I do have to go to Audi, does it have to be Audi or can somebody else with the right gadget?