Just a quick 1 what is the best way of realignment of my headlights , should I take it to someone with a headlight machine or are there ways of checking ,,eg against a wall, is there a measurement that will tell me the ,,eg height ,, any advise would be welcome.

This is the procedure from the EF workshop manual.
It says the low beam should drop 50mm (e) below the height of the centre of the headlight (H) when it's 5m from a wall.



I'd imagine the drop would be similar for all models.

thanks for your great info this will help alot