bro, rest ahmad bhai has told u in his comment... I have bought city 2011 very recently...
My friendly suggestion one: never spoil this lovely car with CNG.. it will never let u feel the cost of petrol... Just do one thing, never push the gas pedal more than halfway..
It will give u mileage of over 23km/l...
prefer to use hi octane fuel for 1st 1000kms...
Secondly.. Honda are not offering the 2 din audio anymore... Instead, best option is to go for oem navi... its given wd two speakers, sadly.
Otherwise go for rockmars...