Right guys, I've posted this on a couple of bmw forums I'm on but not had much in the way of responses so I thought I'd try you lot!

A good friend of ours has a 2008 318d and it's not a happy car right now. It's down on power and running very rough, and also the exhaust smells odd like fuel isn't being burnt correctly. It's like it's misfiring but I wouldn't say it's one particular cylinder, more like they are all just not firing quite right.
I went over and put my Carly on it today and I got the following faults :

004A74 - Embassy (Status GSG LIN, 0x18, LIN).
004A79 - Message (Error status GSG LIN, 0x17, LIN).
0040E9 - Abgasrueckfuehrsteller, position control. (I've translated this and think it's the EGR control system).
00441 - Injector cylinder 1, control.
00442 - Injector cylinder 2, control.
00443 - Injector cylinder 3, control.
00444 - Injector cylinder 4, control.

I cleared all the faults and took the car for a short drive and then ran the diagnostics again. 004A74 & 004A79 were the only ones that were still there. However as it's running pretty badly I assume the others will soon return.

Now - I'm sure I had 004A74 & 004A79 on my 330d, and that was the glow plug control unit. As the next fault on the list (0040E9) is indicating a egr position fault, could it be that the egr is stuck open? Would this cause it to run so badly and as a consequence throw up all the injector faults?

Any help or advice would be greatly appreciated.

Nick.