Garmin 196 accuracy

[Juicy Lucy]

Hi,

this is my first post so please be kind!

I have recently started using a Garmin 196 and find that when I am flying via VORs the heading the VOR wants me on is slightly off from the line shown on the G196 (I put the VOR code in as a waypoint e.g. BPK).

I know that there is a margin of error from the VOR, but is there one for the GPS as well?

Thanks

JL