Pug 306 underbonnet keyhole - cabsmanuk
My 95 306 has a keyhole under the bonnet on the nearside corner. What is it for? I don't have a key that fits so I can't give it a try.

Keep upright
Pug 306 underbonnet key - pendulum
tinyurl.com/ys38uk

That 306 advert makes reference to having the keys for an alarm isolator under the bonnet, so it could be that?
Pug 306 underbonnet key - thomp1983
it's usually to turn off the siren, doesn't disable the alarm just silences the siren

chris
Pug 306 underbonnet key - AlastairW
Yep. So that the lights can flash all night without waking you but leaving a flat battery for the morning. Great!