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To reset the tire pressure monitoring system (TPMS) on a 2009 Mercedes E350, begin by inflating any underinflated tires. The recommended tire pressure can be found on your vehicle's placard. Take the car for a drive so the sensor can verify that the correct pressure has been set for each tire. The TPMS light should then turn off automatically once it registers the adjustment. Following these steps should effectively reset the system.
To reset the tire pressure monitor (TPMS) system in your 2009 Mercedes E350 car, first turn the ignition key to the "on" position. Then press and hold the TPMS button, typically found beneath the dashboard, until the TPMS light flashes a few times. After that, start your car and allow it to run for at least 20 minutes. Your TPMS system should then be successfully reset.