Rear window visibility is seriously hampered by interior reflection on inside of rear window. this vehicle has a light grey interior color and the back package tray and speaker covers are also light grey. this light grey color is reflected on the inside of the rear window glass. when looking out the rear window using the inside rear view mirror, the rear window looks as if it is extremely dirty or fogged. the condition is worse when subjected to sunlight. at present, while awaiting if/when a repair/modification will to be made by the selling dealer, i have laid a black towel on the package shelf as a temporary repair. the black towel has virtually eliminated the reflection and provides clear rearward visibility. toyota is aware of this vehicle's condition and the dealer has forwarded pictures to toyota showing the extent of the visibility impairment. unfortunately, any other avalon with a light color interior will have the same defect.