Huf Beru RDE004 315MHz TPMS Tire Pressure Monitoring Sensor for 2003-2007 Mercedes Benz E Class TPMS Sensors measure tire pressure and trasmit pressure information via radio frequencies back to the vehicles ECU All Huf TPMS sensors include the RDV001 valve/service kit. TPMS Unit comes complete and ready to install Estimated 5-7 year battery life Fits all stock and most aftermarket wheels. Please verify with your wheel manufacturer to confirm fitment.