Hoping I can help someone as the battery drain on my MK5 FSI took years to resolve. Ended up being the Fuel Pump Control Unit which sits on top of the fuel lift pump under the back seat. Cost about $50 from memory and is a simple swap. I only noticed it one night when sat in car whilst in garage and...

Hi All,

My battery has been running down overnight, but seems to charge up okay once it is going. (I can start the car if not left for more than say 12 hours since the last time it was running).

So I've been through the lengthy task of measuring the stationary current draw...