Coolant Temp Sensor Specifications (HFM-SFI)

COOLANT TEMP SENSOR SPECIFICATIONS (HFM-SFI) ⁽¹⁾

Temperature °F (°C)

Ohms

Volts

68 (20)

2500

3.5

86 (30)

1700

3.1

104 (40)

1170

2.7

122 (50)

830

2.3

140 (60)

600

1.9

158 (70)

435

1.5

176 (80)

325

1.2

194 (90)

245

1.0

212 (100)

185

⁽¹⁾	Specifications may vary slightly. See Fig 1 .

Fig 1: Measuring Resistance Of Coolant Temp. Sensor (E320 & S320)

Courtesy of MERCEDES-BENZ OF NORTH AMERICA