JCL,
Excellent advise as usual.OP should at least get the car hooked up to diag equipment to help detect the "fuel inj system" problem and take it to someone who is familiar with the car,thus even saving himself some money as someone familiar with the car will do the job quicker as they know what they are doing .

Mike,
There is another member here ,who very recently had the same issue as you.I have replied to him.The garage also changed the glow plugs ,eventhough the car started fine and of course this wasnt the problem and he still has a "fuel inj sys" issue.I advised him to diagnose the car for a specific error code ,hoping that this will identify it.
Read the thread below ,but it is quite common for the problem to be the sensor on the rail pressure.Please keep us posted,and I am also going to ask the other member for an update on his situation.
http://www.xoutpost.com/bmw-sav-foru...-pressure.html