Hi, does anyone know where the low pressure top up valve is on a mk3 mondy air con system? I've found the high pressure one (the valves are different diameters) just behind the off side headlamp in the engine bay, and i've traced the pipes as far as i can, but with no joy Any help would be much appreciated, thanks

it will be behind the offside wheelarch plastic cover. another classic ford design of making a simple job akward.