‘W’ in rear view mirror - 2010 XC90

[wiliferus]

Can anybody help with this?

I’ve had my 2010 XC90, Executive spec if that’s any relevance, for about 3 months.

I’m 99% sure that before tonight it hasn’t been there, but i noticed tonight there’s a digital W in the top left hand corner of the rear view mirror. It doesn’t change. As far as I know i haven’t pressed anything.

A quick google suggests it maybe a compass but all results say that would be in the top right hand corner, and surely that would change to a N, S, or E as well? Which it doesn’t, just a constant W.

Any thoughts?

[here_we_go]

"The upper left-hand corner of the rearview mir-
ror has an integrated display that shows the
compass direction toward which the car is
pointing. Eight different directions can be dis-
played: N, NE, E, SE, S, SW, W and NW. The
display shows your car's orientation with
respect to true north."

If the compass is activated, it will be displayed
automatically when the ignition is in postilion II
or when the engine is running. The compass
can be switched off or on by pressing the inset
button on the rear side of the mirror (see the
inset illustration). This can be done with
straightened paperclip or similar object. The
button is recessed approximately 1 in. (2.5 cm)
in the mirror."

From manual. Apparently it might want calibrating