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I also put the pilot sports A/S + tires on my 460 L. I purchased them from Costco and they were filled with nitrogen, instead of compressed air. I love the tires and the deal I got from Costco. They were about $1000, out the door, and come with a road hazard warranty.

The kit cost was on sale for $299 plus tax and shipping. I had it installed this weekend and it works great. It is a must have. It allows you to use your phone (including dialing and contacts) and navigation (inputing addresses) while driving the vehicle. It also lets you view a dvd (if you vehicle is equiped with the ML dvd changer) while your navigation routes you to your destination (great for long trips). I would not advise you to watch a movie while driving alone (very dangerous). However, it is good for the family on road trips. I will put in a 'stand up comedy' dvd for my friends on road trips, that way I can also enjoy the dvd feature.