Hi guys/gals. We have a 1996-97 Mk3 Passat 18T at College I'm afraid its petrol but I would say the diesel versions would have the same problem. We've had it a couple of months and the battery is slowly going. Today the students were told to replace the battery with a new one which they did. Now the immobilizer light is flashing and it only runs for a couple of seconds which points to the immobilizer. I've read everything in FQA now I'm presuming because of the year it has a immo 1 which wasn't released in the States before 1999 with a immobilizer. I've read that you can leave the key in the ignition for 10 minutes and it should correct the fault. Some say leave the ignition on for 10 minutes to correct the same problem. I've tried both options and the immobilizer is still flashing. Any sugestions?