Battery OEM Toyota or OEM Audi

I was told to replace the small battery in the back with an OEM battery from Toyota (oddly much cheaper). Problem solved. So far. :)

I had to replace my comfort battery as well 2 weeks ago. The please start engine warning came on all the time before cranking. I ended up getting the batterie from an Audi dealer since the local VW dealer didn't have one in stock. At Audi the battery actually cost $ 60.00 less than if you would buy it from VW.