Audi S4 Fault codes
 

I'm not familiar with these errors and would like to know what could be causing it on the car and where I should be looking at the vehicle itself to discover the problem. ie. P0456 where would I look for the leak?

These are the error that we have found;
Basic OBD2:
P0456 (permanent) (pending) (confirmed) - Evaporative Emission System Leak Detected (very small leak)
Engine:
06202
Radio:
02984 - Connection between Impedance-Converter 2 and Disc-Antenna
Heater & air conditioning:
00256 - Givers for refrigerant pressure/temperature (G395)
Central electronics:
00471 - Controller for EGD electronically regulated absorption (J250)
03207 - Charisma Switch Module

Any help would be much appreciated.