Remove/Install Engine Oil Level Check Switch - AR18.40-P-5113MRA

WARNING: This page is about a different car, the 2023 Mercedes-Benz GLC300, 2022 Mercedes-Benz GLC300, 2021 Mercedes-Benz GLC300, 2020 Mercedes-Benz GLC350e, and 2020 Mercedes-Benz GLC300. However, it is still accessible from the selected car via links, so may be relevant.

Engine 274.9 in model 205

Engine 274.9 in model 253

Fig 1: Engine Oil Level Check Switch Components Location - Engine 274.9 In Model 253

Courtesy of MERCEDES-BENZ USA

	Remove/install
1	Remove center and rear sections of lower engine compartment paneling	Install center and rear section of lower engine compartment paneling only after a leak test.	AR61.20-P-1105LW
2	Release and disconnect electrical connection (1)
3	Remove oil pan bottom section		AR01.45-P-7500MRA
4	Remove screw/bolts (2, 3), place oil level check switch (S43) to one side and remove bracket (4)	Check bracket (4) for damage and replace if necessary. Screw/bolt, oil level switch bracket to oil pan	*BA18.40-P-1003-01I
5	Remove electrical connection from oil pan and remove oil level check switch (S43)
6	Install in the reverse order
	Check
	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 buttoned-up and snug-fitting work clothes. Do not touch hot or rotating parts.	AS00.00-Z-0005-01A
7	Carry out engine test run and check engine for proper leaktightness and function
8	Install center and rear sections of lower engine compartment paneling		AR61.20-P-1105LW

OIL LEVEL/OIL PRESSURE SENSOR

Number	Designation		Engine 274
BA18.40-P-1003-01I	Screw/bolt, oil level switch bracket to oil pan	Nm	9