To summarize my findings as it relates to my original post, and recent visit to a local Lexus dealer to verify and further address these concerns, I was informed that (3 of the 4) wheels where found out of balance, and that (1) one of the wheels had required substantial amount of balance weight (3.65 oz.) to offset the balance of that particular wheel.
Three of the wheels required indexing, meaning the tires where broken down and actually rotated on the aluminum wheel to achieve maximum results when road force balancing was performed, this to essentially obtain the best possible balancing specs. one can get.
I'm happy to report, the results have definitely improved the overall ride quality, eliminating the vibration felt in the seating area while minimizing vibration in the steering wheel substantially. I have been further advised by the tech there at Lexus that large wheels and low profile tire do produce increased road force characteristics in themselves, and are not necessarily as comfortable or vibration free as that of a more traditional style tire, for what that is worth.
My understanding is that the low profile tire is more geared to performance and handling over comfort, as many of you may be aware, as I suspect there will be trade offs in that regard.
Although it's not very likely Lincoln will reimburse me for my out of pocket expenses, I certainly intend to give it a go. : )
As far as my overall satisfaction of the Lincoln dealership involved, I feel they have let me down by one informing me they had set the car right, and two by further wanting me to believe nothing else could have been done to help resolve the issue. Further, that my concerns could not be duplicated. The issue as far as they were concerned was ultimately attributed to road surface conditions compounded by style of tire used on the Lincoln MKZ a (low profile) type.
The end result has in fact proved otherwise, and I feel while any additional out of pocket expense incurred were probably unnecessary if the folks at Lincoln had done the work properly in the first place, these were monies well spent.
Once again, thank you all for your input, and suggestions.
Alex
