Straight from limitations, 100 maximum tyre speed 139, for the 200 and 300 it is 165.
No restriction on the flaps for an approach in ice, although most likely flap 15 would be used if flying an intrument approach.
Ice close to the ground? Just about everywhere at this time of year especially CBR. Wish I could get hold of a picture of one of the Dashes covered in snow at MHU.
hoss