Passenger mirror not dropping when selecting reverse gear

[SHIFTY]

Minor problem but annoying.

Menu settings all correct but when engaging reverse gear the passenger mirror does not move downwards, it used to but no more. Reverse lights are coming on so I thought that the switch within the gearbox would mean that the electronics knows I am in reverse gear.

Just wondered if anyone else has had the same problem and any quick fix without having to take it back to the OPC?.

[SHIFTY]

Gents

Looked at all options above, car does have memory seats, tried resetting(again) but still no good, switch is pointing at passenger mirror.

Any ideas????