I was curious as to whether its north pole is always inclined away from the sun, as it could be if mercury is in synchronous rotation around the sun. It turns out that it is not: it has a 3:2 spin–orbit resonance, rotating three times for every two orbits. On the other hand, its axial tilt is small - only 0.034 degrees [1], which I suppose means that the pole is always close to the terminator - but, as the angular size of the sun as seen from mercury is always a bit over a degree [2], I think that means some fraction of the sun's disk would always be above the horizon at the north pole (unless it is in a crater.)

Update: From this map [3], the pole appears to be on the rim of the crater touching crater Tolkein on the latter's right (see ahazred8ta's comment for a link to an annotated copy of the photograph), and in the photograph, that part of the rim is illuminated.

[1] https://nssdc.gsfc.nasa.gov/planetary/factsheet/mercuryfact....

[2] Data from [1] and https://en.wikipedia.org/wiki/Sun:

   Solar radius: 7e8 M
   Mercury aphelion: 7e10 M
   Angular radius at aphelion = arctan 0.01 = 0.57 degrees.

[3] https://pubs.usgs.gov/sim/3404/sim3404_sheet2_.pdf