Vray for maya IOR help

Im having trouble building a car window shader in vray. Basically I want car windows that have little to no refraction so that the interior of the car is not distorted, but I want the accurate index of reflection of glass. So it seemed that the best way of achieving this was to unlock the fresnel IOR from the Refraction IOR. However when I do that the Fresnel IOR causes the reflections to act completely differently than when the fresnel is locked to the refraction IOR.

So when I have the fresnel locked to the refraction IOR at a setting of 1.6 , the reflections look and act great, but the refraction through the windows totally distorts my interior.If I set the refraction to 1.0, unlock the fresnel, and then set the fresnel IOR to 1.6, the interior looks good but the reflections are dim and the IOR is wrong.

The window geo is just one flat plane. Could that be a problem?

Does anyone have any suggestions?

Thanks!

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