Hi all i am new to this forum so be easy on me. I have a 2006 Audi A4 Cabriolet and recently my key fob has stopped working. I firstly done the obvious and checked the batteries and replaced them with new ones but this did not work. When i press the lock on the fob it locks the boot and petrol flap and thats it does not activate the alarm or lock any of the front doors. When i manually lock the car it locks the driver door and leaves the passenger door open. The alarm lights on the doors do not flash. I am wondering if i need a new Vacuum pump could someone please help me as its doing my nut in. Also i get a left parking light error flash on the dash board have checked the bulbs and even replaced them that has not fixed it was wondering if they are both linked. Any help or advice would be greatly appreciated.