Okay so today I was driving down the motorway and when I accelerated the car did a sort of jerking movement after which the glow plug light started flashing. Almost immediately afterwards I felt the car had lost a bit of power and realised it wasn't accelerating. As if by magic as soon as I noticed this the fault light came on so I pulled over and turned the engine off. When I turned the engine back on the glow plug light had gone off but the fault light was still on. I drove home and the car seemed okay however felt a little low on power. I drive a 2.2 cdti 55 reg. I have no idea what's wrong and it's going to the garage on Friday but has anybody experienced anything like this before?