If memory serves, right hand side of the engine, between head and filter
box.  Yes I think it is quite easy, but I paid someone...

one more

How do you mean?

C

I have a 156 (old exterior, new interior) and I find the headlights very
bright and they definitely put out plenty of light, but I find the
adjustment of them to be strange. I realise that in the UK, headlights point
left slightly to illuminate the side of the road and not dazzle oncoming
vehicles, but I find that my headlights are always adjusted too far to the
left and too high. I have mentioned this on every service and the mechanics
have checked the headlight adjustment and told me all is fine. Going round
even a gentle right hand bend and you can't see the road properly, but have
a beautifully illuminated fence line above the pavement! I have to drive
around with the height adjustment switch (on the dashboard) set to 1 or 2
just to keep the headlights down to a level where I can see where I am going
as opposed to looking at trees (Even with a single person + no luggage)!
Other than messing with the allignment, there is nothign I can do about them
pointing too far left. When in traffic at night, with the switch set at 0
(normal), I can see my headlights lighting up cars in front and often see
people dipping their mirrors - something I find very annoying myself. At
level 0, main beam is fine, so I have to move the level back to 0 again or
they are too low!

Is this what you meant about the lights being 'not very good'