,

The problem is simple, driving a "C" is from a point of view of the road that is farther away from the center line, since the C class has a wider "house" part than a coach as seen from the drivers point of view.

The "coach" has the same with but the driver sits closer to the center line of the road, and thus at the begining she or he tends to drive farther to the right side of the road and therefore go off pavement, only driving the rig will help with the experience that the driver needs to have in order to gage the distance that the coach has to have on the roads side to side.

The other thing that you both need to remember is to slow down a little at the begining until both of you have more experience and are more comfortable with the coach.

navegator