1) Yes the rear seat completely folds to make space for luggage
2 )so far have driven 8000 kms and the car is running great and the milage has significantly increased after 5000 kms
3)it was giving me 14 when brand new with ac and after 1000ks it got better to15 km/liter with ac and now giving nearly 18 with in city without ac
4) The suspension is great but the front seats do not have any lumbar support .I have put a piece of foam in seat covers at bottom end to make a lumbar support and is working for me
attached image with rear seat folded to accommodate luggage
