Ongoing problem w/ s500 computer

Since I have owned my s500 i have had a problem. When I start the car the computer always says "Tire Pressure Control - Reactivate". Then I have to hit reset. The tire pressure is not a problem. The dealer cant figure out the problem. Help???? :eek:

Since I have owned my s500 i have had a problem. When I start the car the computer always says "Tire Pressure Control - Reactivate". Then I have to hit reset. The tire pressure is not a problem. The dealer cant figure out the problem. Help???? :eek:

Tony: what year is your S500? I have a 03 S55 that does the same thing occasionally. I have not yet brought it to the Dealers attention. Also how many miles do you have on the car. Thanks, Fred