Manufacturer: Schrader
Manufacturer part number: 28214
Frequency: 433 mhz
OEM part number (s) coverage: A0009057200, 0045421518, 0035400217, 0025409017, 0025408617, 0009057200, 0009054100
TPMS Relearn website: http://www.tpmsrelearn.com/2016/12/05/mercedes-3/
The TPMS sensor that is used in the 20012-2013 Mercedes C250 is the Schrader 28214. The valve stem is made of aluminum and silver in color.
The valve stem can be removed from the sensor body and replaced with another silver valve stem.
Schrader 28214 fits the following Mercedes models in 2012-2013: C Series, CLS550, E350, E550, E63 AMG, G55 AMG, G550, GL, GL350, GL63 AMG, GLK350, ML350, ML550, ML63 AMG, R350, S Series, Sprinter 2500.
You can purchase the sensor here: https://www.tpms.com/28214_Schrader_TPMS_Sensor_A0009057200_0045421518_p/28214.htm