Hey
Spartan - glad you're getting to the bottom of this.
I see lots of sites list both the BMW numbers you quote as being the same thing but I cannot confirm this.
What I can do is check at home tonight - I have the box the new Beru controller came in plus I still have the old Beru controller - so I can check the numbers on both the old and the new.
I can clearly see 5v written on the old Beru glow plugs and I know the new Bosch glow plugs were also 5v - which fits with this engine using a 5v glow system rather than 12v.
Re. the vacuum reservoir for the turbo boost controller - I'm sure the angle won't make any difference to it's operation (unless it has water in it!) but yeah, they are normally level. Check the mount on the wheel arch - I'm betting someone has removed it at some point and re-fitted it incorrectly.
And while you are there, check the vacuum line connections - you would know if it was disconnected but a visual check can't hurt.
