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Remove/install coolant temperature sensor - AR15.60-P-2711MT

ENGINE 270 in MODEL 117, 156, 176, 242, 246.2 

Fig 1: Coolant Temperature Sensor Remove/Install Components
G10250198Courtesy of MERCEDES-BENZ USA
REMOVINGINSTALLING Remove/install     
1 Drain coolant   AR20.00-P-1142NKB
2 Remove charge air distributor   AR09.41-P-1310MT
3 Disconnect electrical connections at coolant temperature sensor (B11/4)    
4 Detach coolant temperature sensor (B11/4) at cylinder head; to do this remove screw/bolt (1s) and remove bracket (1) INSTALLATION IMPORTANT Replace sealing ring.  
5 Install in the reverse order    
INSPECT Check     
6 Check cooling system for leaktightness   AR20.00-P-1010NKB
DANGER Risk of accident  from vehicle starting off by itself when engine running. Risk of injury  (bruises and burns) resulting from working on the engine while it is being started or when it is running. Secure vehicle to prevent it from starting off by itself. Wear closed and snug-fitting work clothes. Do not touch hot or rotating parts. AS00.00-Z-0005-01A
7 Perform an engine test run and check engine for leaktightness