Does anyone on here know anything about warning lights / symbols? My Golf TDI keeps displaying a flashing glow plug light and the cat won't rev above 300 rpm. I mentioned to dealer whilst it was in for cambelt last week but they said that no code had been stored. The car is under warranty, I find this odd as my last car which was an old Astra stored the code anytime the EML came on and the fault was easily found. I can't see the point of warning lights that don't store an error code. Got to drive on motorway tomorrow won't be much fun in limp mode!