inflating

Hello you all, please somebody give me a help out here... my C Class Estate multicontour seats do not inflate anymore... noticed it yesterday when trying to inflate a bit more the side support blatters... no air inflating in... just deflating worked until no air left inside the cushions... where...

Ok so I was having trouble inflating the tyres of my W123 240D. I have recently asked MB to replace the old ugly rubber/plastic valves for some metal ones (part number 1074000013). But a couple of days ago when I went to my local BP petrol station I couldn't for the life of me properly fit...