I've just bought an E320 V6 (00) and am considering having it converted to LPG. Does anyone have any experience of this (good or bad feedback) and is there any reason why an LPG converted car cannot also be chipped to produce more power. The options for a tank for the LPG are quite limited. The space saving option seems to be a dougnut type that sits in the spare wheel well. Is it possible to have a space saver wheel mounted under the car?