Front door locks have stopped working, aircon is cooling but often displays the little green book, radio sometimes doesn't come on and i have to to squeeze it on the side, my mpg is 22 and i am hoping it can be improved. it used to be 20 and only improved after fitting stainless exhaust. Vehicle has been serviced by my local garage but they are not land rover experts so I want to see if the little problems can be sorted by someone that actually knows what goes on on the rangie.