topped

Just wondered if anyone had ever used the stuff they sell in Halfords to recharge your aircon and if so where do you attach it to as there seems to be two possibilities either at the front or at the rear bulkhead where there seems to be pipes that have a bleed nipple affair once you unscrew the...

As i say...the YELLOW oil light is on in my leon but the oil level is fine, im assuming its just the sender in the sump, im sure I don't have an oil pressure problem as I only fitted a new pump about 4000 miles ago! Any ideas?:wtf: