Hello all. Yesterday I took possession of a 2005 E320 with only 32,500 miles on it. It's a CarFax certified Florida car in great condition and I hope to have it a long time (my last E320-W210, lasted almost 18 years). One slight problem with the new car. It has Keyless Go, which is a pretty cool system. But, the passenger side rear door window keeps going down on its own. It doesn't go down in a smooth motion, but goes down a couple of inches at a time, almost like a jerking motion. Most of the time I can make it go back up from the switch on the driver's door, but it takes multiple attempts. I'm not sure if it's the window regulator (I changes a bunch of those on the 210), or the Keyless Go system. Any thoughts? Thanks.

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