ive got the old style keys for my a3 and want to buy one off e-bay and i wanted to ask if you guys would be kind enough to check the key numbers and tell me what you have so that i can get one similar as ive found the a4 ones different,my numbers are HLO 8PO 837 231 on my old style keys at the moment....im thinking of transfering the immob chip over to the new key? if it will work.