Remove/Install Coolant Temperature Sensor - AR15.60-P-2712MMV

Engine 276.8 in model 205, 222, 253 

Shown on model 205 

Courtesy of MERCEDES-BENZ USA

Shown on model 205 

Fig 1: Coolant Temperature Sensor Components Location - Engine 276.8 In Model 222 (Shown On Model 205)

Courtesy of MERCEDES-BENZ USA

	Risk of injury.  Skin or eye injuries may result when handling hot or glowing objects.	Wear protective gloves, protective clothing and safety glasses, if necessary.	AS00.00-Z-0002-01A
	Risk of injury  to skin and eyes suffering scalding from contact with hot coolantspray. Risk of poisoning  from 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
	Risk of injury  caused by scraping or cutting body parts on sharp vehicle parts	Always wear protective gloves when working on or near sharp and non-deburred vehicle parts. Deburr repair panels.	AS00.00-Z-0017-01A
Topical note	Notes on avoiding damage through contamination and foreign objects		AH00.00-P-5000-01A
	Remove/install
1	Remove front lower engine compartment paneling	Engine 276.8 in model 222	AR61.20-P-1105LF
		Engine 276.8 in model 205 Engine 276.8 in model 253 :  Only install lower front engine compartment paneling after leak test.	AR61.20-P-1105LW
2	Drain off coolant	Engine 276.8 in model 205 Engine 276.8 in model 253	AR20.00-P-1142LW
		Engine 276.8 in model 222	AR20.00-P-1142LF
3	Remove left-hand air filter housing	Engine 276.8 in model 205 Engine 276.8 in model 253	AR09.10-P-1150MMV
		Engine 276.8 in model 222	AR09.10-P-1150LFA
4	Remove soundproofing of left rail
5	Remove coolant hose (10) at bulkhead (4)		AR20.20-P-7441-01RQ
6	Unclip wiring harness (2) at bracket (3)
7	Remove bracket (3)	Bolt, control unit holder to cylinder head/cylinder head cover	*BA07.08-P-1004-01A
8	Remove center section of the bulkhead (4)	Engine 276.8 in model 222
9	Remove vacuum pump	Engine 276.8 in model 222	AR43.05-P-1320LF
		Engine 276.8 in model 205 Engine 276.8 in model 253	AR43.05-P-1320LW
10	Open connector (8)		AR20.20-P-7441-01RQ
11	Remove coolant hose (10) upwards)	:  Replace sealing ring.
12	Remove screws/bolts (11)	Bolt, heater feed to cylinder head	*BA20.10-P-1006-01AA
13	Remove coolant line (12)	:  Install new sealing rings.
14	Release and disconnect electrical connection (13)
15	Release and remove coolant temperature sensor (14)	:  Replace sealing ring.
16	Install in the reverse order
	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
17	Perform an engine test run and check engine cooling system for leaktightness
18	Install front lower engine compartment paneling	Engine 276.8 in model 222	AR61.20-P-1105LF
		Engine 276.8 in model 205, 253	AR61.20-P-1105LW