the IFZ module is most likely the cause of your concern, it is responsible for two things, a; infrared remote central locking. b; drive authorization system (das2). looking at your test printout you have CAN: no reception from IFZ. this can be caused by three problems A; faulty IFZ control module B: faulty transponder coil (serves as the data link between the key and IFZ module) C: faulty key. check the part number on the IFZ module it must be 210 820 32 26 or greater such as 210 820 32 27. unfortunatly this concern can be hard to diagnose as HHT (hand held tester) has very limited funtion unlike its replacement STAR DIAGNOSIS where you can test all control modules from about 1997 on. (about the same time they went to das3 electronic key). let me know how it goes with the new IFZ and key, in the meantime i will endevour to delve into the archives for more information.