Bongo Fury

I've been thinking of getting my air conditioning recharged at Kwikfit. The problem is I have no idea where the aircon unit is located or even what it looks like. Can someone please enlighten me Also, what amount should it take and any relevant numbers please My experience with these places is if you don't know what you are talking about they will probably offer you a job.

the unit is just behind the front gril and not sure how much it takes but there is a topic further down on here about kwick fit and air conditioning (was reading it earlier)