DRIVE ON ALL NEW ERTIGA ZXI+

I got the car of my choice the All new ertiga zxi+ variant , by look and comfort its better AC is good , Its nice to drive long at a stretch for 5 + hours . We need to downshift the gear during over taking . The fuel efficiency is not as promised - its max 10 to 11 km per liter at nominal load on long trips , ( i dont know whether this fuel efficiency will improve after few thousand KM more if any changes or special service - they will do during the 5K and 10 K service ) I was expecting from the promised 19.4 KMPL for petrol models - at least 12 to 14 KMPL in cities and 18 to 19 KMPL in High way - long trips with AC . Whether would be the fuel efficiency improve after few service ....? Over all its a better car for 6 to 7 members of family ( family with kids & grand parents ) - last row should be kids for perfect fit The passenger seats need to be fixed @ some experienced agency (say like Tamil Nadu Coimbatore region - which best for seat / cover fixation ) with better covers & cushions - same as costlier cars for good travel experience More added LED in front grill , fuel efficient , slightly bigger wheel will dominate the sale in the market , while if they launch this they have to upgrade the already sold cars during service will give a more positive mindset for users which could boost the ( moral) sales