Test, regulate idle speed - AR07.00-P-3002WB

ENGINE 104.943 /991 as of 1.6.96, 

112.923 /943, 113.961, 119.982, 120.983 

in MODEL 129 

ME-SFI fuel injection and ignition system with STAR DIAGNOSIS 

ENGINE 104.944 /994 as of 1.6.96, 

119.980 /981, 120.982 

in MODEL 140 

ME-SFI fuel injection and ignition system with STAR DIAGNOSIS 

ENGINE 112.942, 113.942 in MODEL 163 

ME-SFI fuel injection and ignition system with STAR DIAGNOSIS 

ENGINE 111.943, 

111.946 as of 1.6.98, 

111.973 

in MODEL 170 

ME-SFI fuel injection and ignition system with STAR DIAGNOSIS 

ENGINE 104.941, 111.944 as of 1.8.96, 

112.910 /920, 113.944 

in MODEL 202 

ME-SFI fuel injection and ignition system with STAR DIAGNOSIS 

ENGINE 111.974 in MODEL 202 with CODE (491) U.S. version 

ME-SFI fuel injection and ignition system with STAR DIAGNOSIS 

ENGINE 111.975 as of 1.8.96 in MODEL 202.024 

ME-SFI fuel injection and ignition system with STAR DIAGNOSIS 

ENGINE 111.975 in MODEL 202.085 

ME-SFI fuel injection and ignition system with STAR DIAGNOSIS 

ENGINE 111.944 /975, 112.940, 113.943 in MODEL 208 

ME-SFI fuel injection and ignition system with STAR DIAGNOSIS 

ENGINE 111.945 as of 1.6.98 in MODEL 208.335 

ME-SFI fuel injection and ignition system with STAR DIAGNOSIS 

ENGINE 111.945 in MODEL 208.435 

ME-SFI fuel injection and ignition system with STAR DIAGNOSIS 

ENGINE 111.947, 112.911 /921 /941, 113.940 /980, 119.985 in MODEL 210 

ME-SFI fuel injection and ignition system with STAR DIAGNOSIS 

ENGINE 104.995 as of 1.6.96 in MODEL 210 

with CODE (491) U.S. version 

with CODE (498) Japanese version 

ME-SFI fuel injection and ignition system with STAR DIAGNOSIS 

ENGINE 112.922 /944, 113.941 /960 in MODEL 220 

ME-SFI fuel injection and ignition system with STAR DIAGNOSIS 

ENGINE 113.992 in MODEL 230.474 

ME-SFI fuel injection and ignition system with STAR DIAGNOSIS 

Connection diagram for testing idle speed. 

Shown on Model 210

Fig 1: Identifying Connection Diagram For Testing Idle Speed - Shown On Model 210

Courtesy of MERCEDES-BENZ OF NORTH AMERICA.

	Risk of accident.  Accidents may result if the vehicle starts off unintentionally with the engine running. Risk of injury  as working around the engine during start-up or while running may result in contusions and burns	Secure vehicle to prevent it from moving. Wear closed and snug-fitting work clothes. Do not grasp hot or rotating parts.	AS00.00-Z-0005-01A
	Risk of death.  Death may result if contact is made with parts carrying high voltages.	Do not touch parts carrying high voltages. Persons who wear electronic implants (e.g. heart pacemakers) must not carry out work on the ignition system.	AS15.10-Z-0001-01A
	References to test conditions for engine testing and adjusting work	Air conditioning or automatic air conditioning switched off, coolant at correct level, oil in engine at correct level, ATF at correct level and no leaks in automatic transmission (visual inspection), ancillary consumers switched off.	AH07.00-P-3000-01A
	Test and adjustment values	in HHT-WIN
		Engine 119	dh0a00pm00062x
		Engine 120	dh0a00pm00061x
		relevant HHT-WIN contents: Test idle speed, emission test (AU)
1	Connect test equipment according to connection diagram
	Connection of diagnostic test equipment	Connect STAR DIAGNOSIS	AD00.00-P-2003A
		Diagnosis system STAR DIAGNOSIS	*WH58.30-Z-1048-13A
	only for models not fitted with TWC or for emission test (AU)	4-point analyzer with lambda calculation	*WE58.40-Z-1001-06A
	only for models not fitted with TWC or for emission test (AU)	Exhaust probe	Figure
2	Inspect throttle control for ease of operation and condition. Lubricate all bearing points and ball sockets.	except Model 220
3	Test closed throttle/wide open throttle stop at pedal value sensor
4.1	Selector lever position of automatic transmission readout P/N
4.2	Depress clutch pedal of manual transmission readout ON/OFF
5	Start engine	Warm up engine to operating temperature (coolant temperature > 80°C)
6	Test engine oil temperature	Engine 112, 113 with HHT-WIN
7	Test coolant temperature	with HHT-WIN
8	Test idle speed	with HHT-WIN
9	Check idle speed recognition (accelerator pedal not actuated): Display ON	with HHT-WIN
10.1	Test idle speed exhaust value without TWC and set	with HHT-WIN
10.2	Test lambda control upstream of TWC right/left (if fitted)	with HHT-WIN Models not fitted with TWC
11	Test smooth engine running	Test in selector lever position D (parking and service brake applied) and with consumers switched on.

Fig 2: Identifying Emission Sensor (126 589 11 63 00)

Courtesy of MERCEDES-BENZ OF NORTH AMERICA.