Had a go at this today - close, but no cigar. I was able to remove the front grill, but I cannot get the air 'conveyor' aka the black plastic shroud out for love nor money... will start a separate thread on this.
With my logical hat on and with the air conveyor out the way I
should then gain access to the horns and also the front badge. In the meantime I'm stuck with the high pitch horn.. it's actually sounds quite comical as it is fairly high pitch!
Kind of looks like a blue whale without the front grill.