Great manual. Would you happen to have one for the 2003 engine? I believe it's the VE engine.This would get you close but does not give location of the item on one particular car. It deals with the principals of the design.
The Bentley manual for your model year will also be helpful and be more specific for the location of components.
Cool links. Any idea where one can get the paper Golf model that's at the end of the third? Only the directions are there.The intake air pressure & temp sensor on the rigid pipe is also used to read outside air pressure before starting.
There's also the 2 position sensors that are part of the go pedal assembly.
You might find these Self Study Programs VW put out with the launch of the Mk4 interesting:
And this one with the introduction of the 1.9 TDI. It lists all the sensors: