New purchase G350BT – Questions about Mopf and Distronic Plus

Dear G-meinde A new G is about to be a diesel, a 350BT again. If I order in Dec, it will be there in May 2014 (Switzerland).Do you know when the next model change (Mopf) will take place and what changes are planned? New engine (Diesel)? Is it worth waiting with the order? Another question about the Distronic Plus – what are your experiences with it? Is this worth it? Thank you for your information / advice!