2003 Mercedes Benz S430

Electrical problem
2003 Mercedes Benz S430 V8 All Wheel Drive Automatic 87000 miles

My car is not detecting my smart key. It will not lock unlock and when placed into the ignition tumbler it will not turn. The odometer shows the true mileage upon entering the automobile, but the display soon changes to. I changed the battery in the smart key and even tried a jump and neither worked. What do you think the problem may be? Thanks!
October 4, 2010.

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