Well new filter is cheap, and fuel pumps don't last forever, so I would say you are on the right tracks.

On the D3 with the GAP tool you can switch off auto lights and auto wipers, both things that annoy me. So I would assume it is the same with the fl?

Re anneal the copper washers, easy and quick.

Crap pics

Just looked at an old pic of mine, and the belt is the same size you have bought. If you get a minute measure the od of the pas pulley and I will check mine.

Unplug one side HID unit, plug in a normal H4 bulb and see if the flickering still occurs, if it does the car is at fault, if not the HIDs are duff, simple and no fancy knowledge needed. Do not lean the H4 bulb against anything soft/plastic as...

I know there is only 4 glow plugs, but starting on 4! To the op, remove the air filter trunking and have a listen when you start it.

That is a casting number, and not an engine number. You could try a little acid on where the engine number should be and see if anything shows up. Any pics of your pump and the incorrect pumps?

Hbrake cable is the thing that runs through the hook attached to the lower arm.

Year of car will help, and when you state replace brakes, do you mean pads/shoes or calipers as well?