Cappy wrote on Mar 13^th, 2013 at 3:20am:

If you look at those CDU pics (R) seems to me to be in Radial track mode. You could try placing an (I) where the (R) is being shown for ILS mode. Just my guess. I don't own the plane.

They are VOR receivers they can't tune an ILS frequency, let alone operate in "ILS mode" (whatever that is).

The only function of a VOR is tracking a radial, or pointing to the transmitter.