So we've decided to go for the CLK (auto), for our first MB, not sure if it will be a 270 or 320 CDI. Head says 270 for economy, heart says 320 (maybe sport) for a bit of loud pedal fun. From what I can see the 270 seems to have the 5g box, the 320 the 7g box. I've read the various comments and debates about the 7g box, but that aside, is my assumption correct about which box is with which engine? Aiming to buy a post 2004 for the galv body, maybe late 2004 or 2005 model.