Great Car with Bad NVH level

i have bought this car in December 2016 and till now i have driven it 13000km and still running like a charm. Riding and handling is superb and stearing is very light and smooth you can handle it with your smallest finger. Mileage i am getting 18km/l in city and around 24 on highways. sometimes back gear stucks. i have diesel one and the vibration and sound comes from tbe engine is sometimes horrible. low at top gears.