I never pulled the screws off and removed the floor in the trunk to manually see if my F10 2013 M5 has an AGM battery or not. Still using this Ctek (link below) which has a "Normal" and "AGM" mode. This charger and trickler is one of the best out there but can't use it to its fullest until sure which mode to leave it on.
http://www.amazon.com/gp/product/B00...TJKFTUSNCNVJFP
Before I start unscrewing everything in the trunk and messing anything up back there, does anyone know if these '13 F10 M5's are indeed AGM? I searched around and still can't find anything definitive and figured maybe somebody here has replaced their battery or dismantled the lower trunk to check so I don't have to reinvent the wheel.
thanks