If it helps, the only advice I can find on 14" Rims for the A2 is on Page 261 of my Owners Manual. O.K. it`s to do with Snow Chains but there is a table :-
Rim Size 4J x 14 Offset ET 35 Tyre Size 155/65. Rim Size 4.5J x 14 Offset ET 35 Tyre Size 155/65. Rim Size 5J x 15 Offset ET 28 Tyre Size 155/65.
Rim Size 4J x 14 Offset ET 35 Tyre Size 155/65. Rim Size 4.5J x 14 Offset ET 35 Tyre Size 155/65. Rim Size 5J x 15 Offset ET 28 Tyre Size 155/65.