Lewbow

Hi all I have just purchased an Audi 2.7 tdi s line multitronic with 70k on the clock and I have a few questions to ask 1: what are they like to remap. Never had a car remapped before but expected a little more of a 2.7 v6 2: can the individual led lights in the tail gate be replace I've just bought one side now the other one has gone 3.back to the first one really will a remap mess around with the multitronic gear box? I don't want to damage the car really