Check oil pressure - AR18.00-P-1250CD

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ENGINE 651 in MODEL 166, 172, 204, 207, 212, 218, 221

Fig 1: Oil Pressure Components

Courtesy of MERCEDES-BENZ USA

	Remove/install
	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
1	Check engine oil level, correct if necessary	The engine oil level must lie between "Min" and "Max". Engine damage can occur otherwise.
2	Warm up engine to normal operating temperature
3	Remove cylinder head cover trim
4	Remove screw plug (1) from cylinder head	Replace sealing ring.
5	Screw adapter fitting with sealing ring into the cylinder head	The pressure hose includes the adapter fitting.
5		Pressure hose	Fig 2
6	Tighten down pressure gauge with pressure hose on adapter fitting	Pressure gauge	Fig 4
6		Pressure hose	Fig 2
	Check
7	Guide remote thermometer into oil oil dipstick guide tube	Remote thermometer	Fig 3
8	Start engine and check oil pressure at the specified rotational speeds and temperatures	Oil pressure	*BE18.00-P-1001-01A
8		Oil pressure	*BE18.00-P-1002-01A
9	Install in the reverse order
10	Check engine oil level, correct if necessary	The engine oil level must lie between "Min" and "Max". Engine damage can occur otherwise.