Dear All,
I'm here to sound if someone know about potential troubles on the new CNG cylinders Type 4 (plastic liners + wrapped composite fibers) mounted on Audi A3 Sportback G-TRON.

I mean, CNG Type 4 cylinder technology is the very latest one on the market and those cylinders are incredibly light (vs. steel ones), but I got some rumors they've got safety troubles (i.e. happened on Mercedes Class B) and, even most important, in some countries (like mine) they cannot perform periodical inspection due to the fact too much sensitive to re-testing!?!?!?!

Is there anyone know about that?
Any official response to such problem by Audi???

I will be hugely grateful to everyone will help me in getting more information about that......

Take care Audi people!!!!
Methaner