Front parking sensors don't seem to activate on my Scout unless you engage reverse first i.e. drive slowly forwards up to wall to park, no beep. But stop short, momentarily engage reverse and then first and pull forward and front sensors work fine?

The manual says there should be a button below the climatronic controls you can press to activate it:

Front & Rear Parking Aid

Activating

The parking aid is activated when the reverse gear is engaged and the ignition is

turned on or by pressing the button ⇒ fig. 150 - the symbol lights up in the

button. The activation is confirmed by a brief acknowledgement signal.

Deactivating

The parking aid is deactivated after pressing the button° ⇒ fig. 150 or at a speed

of more than 10 km/h - the symbol  in the button is no longer illuminated.

RTFM then

Thanks!