The Ford Mondeo problem was due to an older driver fighting off a wasp inside the car and hitting a kerb as a result and this bent his suspension. In your case the fault might be bias in the tyres so there are two simple things to try. The first (assuming the tyres are not directional) is to swap the front wheels side to side. If that doesn't work, then swap the fronts with the rears same side. If you still have a problem, get a laser alignment.