I think having the display showing MHz for the air band would have been a better choice on Grundig's part, but it really doesn't matter that much. Its just a matter of moving the decimal point to the left three places.
As far as getting better reception on the air band, here are some tips:

1. Use an antenna.
2. Try other antennas.
3. Find a known active freq.
4. Find a freq. low of FM spurs.
5. Turn up the volume.

I own and use a G6, and get decent results with it on the airband.