firstly its a mk6 not mk7, mk7 dosn't exist.

its unlikely to be the MAF sensort TBH.

check the air filter and check for any holes/splint in the pipes.

also its likely the sprayer took the battery off, so it could be the ISCV.

take the battery off for half hour, with lights on so all power is drained, make sure mass air flow sensor is plugged in and after a while put batter back and take it for a nice long drive. 50 or so miles.