horn does not work so either its me being thick or it has been removed (which i suspect it has) if anyone could tell where the cables enter the engine bay? i would be really grateful

You should find it behind the front bumper.Access should be available by droppin the plastic arch liner.They usually put one on each side.

Mine is mounted on a bracket that is below the driver side headlight. You CAN get to them from under the car... but it's hard. Might be easier on a 5 though. I got to mine much easier by just taking the headlight out. Then you will have to worry about realigning the headlight though.

I believe the previous owner have shifted it.
mine is infront of the air con condensor and behind the grill.
look at the spot light window,some have it there.
otherwise buy two bosch horns and install.

Errrr... If I remember correctly, try behind the foglight in the front airdam.