Hi, I think I found out something. At this
http://stores.channeladvisor.com/towbar/Items/TOW1? there is a towball that should match the Grande Espace, so I bought one and shipping included it ended up in allmost 40£
I look forward getting this, ill let you all know wether it works. and allso on the Renault sticker that were placed on the towbar, it says 11,5 kN and Stützlast 85 kg and on the one ive just bought it says This is a Listing for a 50mm Tow Ball (EC Approved) - (Gold)Type approved towball. A type approved towbar is required for 'S' registered vehicles and onwards. This will fit any flange type towbar. 'D' Value 17kn, 'S' value >200kg
This looks okay...
Thanks