i think your cars are broken!! id take em to a garage thers a weird number 4 at the start of your mpg ive never seen this before must be a bad fault haha
oh and u need to top ure window wash up mate lol .. you get an original maff mate? how much?? vw stealers want £120.00 
maybe im getting better mpg cos iv no screenwash and a tad lighter

, got mine at TMS £60 odd quid it was, im sure its an aftermarket 1