Not exactly a Lexus specific problem, but someone might have an answer.
Recently we had a holiday on the South Coast, the first time we've taken the IS on holiday.
Driving along some of the narrow country lanes, I often found that the reflection off the dashboard of the sun coming through the trees,
made it extremely difficult to see where I was going. I had a similar problem many years ago with an Accord I owned, and found the solution
was to cut a piece of black material (an old T-Shirt) and lay that on the dashboard. There are covers commercially available, but have not seen
any for a Lexus, not for an IS anyway and not in the UK.. It must be something to do with the rake of the screen (?) as I didn't get the same problem with my civic.
Anyone had the same issue ?........ and no, polaroid glasses are not the answer.
If you have never tried it, sit in your car on a sunny day, and place a piece of matt black material ove the dashboard. The difference is amazing.