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Remove/install temperature sensor - AR15.60-P-3000SX

ENGINES 272, 273 in MODEL 221 Coolant temperature sensor 

ENGINES 273 in MODEL 216 Coolant temperature sensor 

Fig 1: Identifying Temperature Sensor Remove/Install Components
G10126652Courtesy of MERCEDES-BENZ USA
REMOVINGINSTALLING Remove/install     
DANGER Risk of death  caused by vehicle slipping or toppling off of the lifting platform. Align vehicle between columns of vehicle lift and position four support plates at vehicle lift support points specified by vehicle manufacturer. AS00.00-Z-0010-01A
DANGER Risk of injury  to skin and eyes caused by scalding from contact with hot coolant spray. Risk of poisoning  caused by swallowing coolant. Do not open cooling system unless coolant temperature is below 90°C. Open cap slowly and release the pressure. Do not pour coolant into beverage containers.
Wear protective gloves, protective clothing and safety glasses.
AS20.00-Z-0001-01A
NOTES Information on preventing damage to electronic components due to electrostatic discharge   AH54.00-P-0001-01A
1 Switch off ignition    
2 Remove rear section of lower engine compartment paneling INSTALLATION IMPORTANT Prior to installation, clean escaped coolant off the engine and transmission. AR61.20-P-1105SX
3 Remove air filter housing (1).   AR09.10-P-1150SX
4 Reduce pressure in cooling system by slowly opening cap (2) on the expansion reservoir (3) for the coolant and closing it again IMPORTANT The coolant temperature should be approx. 40°C.
IMPORTANT Do not drain off coolant!
 
5 Disconnect electrical connector on crankshaft Hall sensor (B70)    
6 Disconnect electrical connector at coolant temperature sensor (B11/4)    
7 Remove bolt (4) and remove clamping plate (5) TORQUE SPECIFICATION *BA15.60-P-1001-01A 
8 Fit new O-ring (6) to new coolant temperature sensor (B11/4)    
9 Pull coolant temperature sensor (B11/4) out of cylinder head and immediately insert new coolant temperature sensor (B11/4)    
10 Install in the reverse order    
11 Pour in coolant and bleed cooling system   AR20.00-P-1142SX
12 Read out fault memory with STAR DIAGNOSIS and erase if necessary    
REFER TO SELF-DIAGNOSTIC SYSTEMS Connect STAR DIAGNOSIS and read out fault memory   AD00.00-P-2000-04A
TEMPERATURE SENSOR

Number Designation Engine 272 Engine 273
BA15.60-P-1001-01A Bolt, clamping plate for coolant temperature sensor to cylinder head Nm 8 8