Buddhika Aruna

Hi guys, I'm a new user for this site. I'm using a Toyota Vitz ksp90 2008 with a mileage of 77380km. There is an abnormal sound coming from engine and a vibrating feeling when i put gear into either D or R. It's doesn't always happen with brake, but it's slightly reduced when I turn the a/c off. This does not happen when being driven, at N or P. Spark plugs changed were bought at Toyota Lanka, injectors, throttle body cleaned and air filter changed from a guy at delkanda pola road. But there is no reduction in either of those problems. Can it occur because of a faulty engine mount? Please give your expertise ideas on this and a reliable & reasonable place to sort out this problem I'm from Maharagama