HI everyone, many thanks for the replies!So am I right in thinking that this 'battery drain issue' is effectively...1. Install RNS 510 in pre 2007 (pre K CanBus controller) golf2. park the car up, don't drive for 36-48 hours, and the battery drains?soo..... on the assumption that the car is driven daily about 80miles or so, mix of motorway and inner city, i shouldn't really experience the drain until i leave the car for over 24hours standing off correct?(i'm curious if this will be ok as a 'stop-gap' until I can get a hold of the can gateway) the breaker i got my highline cluster off has the other highline parts for the golf, but i'm off on holiday on sunday until second week of jan so gta put it on hold!)thanksMine went flat in about 10 hrs, it was fine for about 2 months and it had been left longer than 48 hrs , so i thought i had cracked it , then out of the blue i got up one morning and the car battery was dead. that was on firmware 1300, i downgraded back to 1100 and all's been fine