Testing compression pressure - AR01.00-P-1200V

ENGINE 112 

Air filter arranged on the engine side 

ENGINE 113 (except 113.995) in MODEL 129, 163, 202, 203, 208, 209, 210, 211, 215, 220, 230 Air filter arranged on the engine side 

ENGINE 112.945 in MODEL 463.209 /232 /233 /244 /245 /250 

ENGINE 113.962 in MODEL 463.206 /240 /241 /247 /248 /249 /254 

ENGINE 113.982 in MODEL 463.243 

Fig 1: Identifying Compression Recorder Assembly

	Remove/install
	Risk of accident  caused by vehicle starting off by itself when engine is running. Risk of injury  caused by contusions and burns during starting procedure or when working near the running engine	Secure vehicle to prevent it from moving by itself. Wear closed and snug-fitting work clothes. Do not grasp hot or rotating parts.	AS00.00-Z-0005-01A
1	Bring engine to operating temperature (approx. 80°C)	Test compression pressure only when engine is at normal operating temperature.
2	Remove air filter housing	All except model 203.065/265, 170.466: ↓ Detach the air filter housing from the rubber retainers at the cylinder head covers vertically upward. Models 211, 220, 230.475: Unclip engine front end cover. Installation:  Rub the retaining rubbers on the cylinder head covers and sealing ring of the hot film air mass sensor in the air filter housing with lubricant.
		Models 230.474, 203.065/265, 170.466	AR09.10-P-1150SVK
		Lubricant	*BR00.45-Z-1002-06A
3	Remove spark plugs	Remove only one spark plug per cylinder: ↓
		Models 463.209 /232 /233 /244 /245 /250 with engine 112.945.	AP15.10-P-1580GA
		Models 463.206 /240 /241 /247 /248 / 249 /254 with Engine 113.962.
		Models 463.243 /246 with Engine 113.982
		Models 211, 220, 230.474/475	AP15.10-P-1580AB
		Models 210, 208, 203, 202, 170, 129	AP15.10-P-1580A
4.1	Remove key from electronic ignition switch (EIS)	Models 211,230.474/475 Vehicles with code (889) Keyless Go: Press the start/stop button repeatedly until the ignition is switched off.
5	Crank engine with starter.	Do not crank engine at steering lock but use contact switch of the compression recorder. In order to remove the combustion residue from the cylinders, crank the engine for about 5 seconds with the starter.
		All except model 203	AR01.10-P-0110V
		Model 203	AR01.10-P-0110PV
	Checking
6	Insert compression tester into spark plug bore	Compression recorder	Figure
7	Open throttle valve	Except models 211, 230.474/475
8	Crank engine with starter.	Do not crank engine at steering lock but use contact switch of the compression recorder.
		All except model 203	AR01.10-P-0110V
		Model 203	AR01.10-P-0110PV
9	Carry out test procedure at the remaining cylinders in the same way
10	Compare measurements obtained with the specified pressures	Compression installation tolerance or new value	*BE01.00-P-1001-01D
		Compression pressure wear limit or limit value	*BE01.00-P-1002-01D
		Compression pressure permissible difference between individual cylinders	*BE01.00-P-1003-01D
		If the pressure is below the minimum compression pressure or if the permissible difference between individual cylinders is exceeded: ↓
		Inspect cylinders for leaks	AR01.00-P-1300HV
11	Install in the reverse order

Fig 2: Identifying Compression Recorder (001 589 76 21 00)