I have the CTEK 3300,
It works on all the vehicles in the household and obviously it did its job for my old 335i and my m3.
- 2012 AW/FR E92 M3 - DCT w EDC, ZPP w Tech, Apps, Enhanced Sound, SAT.
- Piano Black, Euro Visors, OEM Performance CF Spoiler + Grills + Pedals, IND Gloss Blk Pkg, Lux V3, Arkym CF Front Lip, 19" HRE P40
- 2008 BSM/Black E92 335i - Step, Premium, Sports, Logic7, Comfort, Navi, SAT, Alum.