Test engine performance and exhaust emissions - AR07.00-P-3003WA

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 handheld tester 

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 handheld tester 

ENGINE 112.942, 113.942 in MODEL 163 

ME-SFI fuel injection and ignition system with handheld tester 

ENGINE 111.943, 

111.946 as of 1.6.98, 

111.973 

in MODEL 170 

ME-SFI fuel injection and ignition system with handheld tester 

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 handheld tester 

ENGINE 111.974 in MODEL 202 with CODE (491a) USA version 

ME-SFI fuel injection and ignition system with handheld tester 

ENGINE 111.975 as of 1.8.96 in MODEL 202.024 

ME-SFI fuel injection and ignition system with handheld tester 

ENGINE 111.975 in MODEL 202.085 

ME-SFI fuel injection and ignition system with handheld tester 

ENGINE 111.944 /975, 112.940, 113.943 in MODEL 208 

ME-SFI fuel injection and ignition system with handheld tester 

ENGINE 111.945 as of 1.6.98 in MODEL 208.335 

ME-SFI fuel injection and ignition system with handheld tester 

ENGINE 111.945 in MODEL 208.435 

ME-SFI fuel injection and ignition system with handheld tester 

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

ME-SFI fuel injection and ignition system with handheld tester 

ENGINE 104.995 as of 1.6.96 in MODEL 210 

with CODE (491) USA version 

with CODE (498) Japanese version 

ME-SFI fuel injection and ignition system with handheld tester 

Connection diagram of checking and adjusting engine ME-SFI fuel injection and ignition system with HHT 

(shown on model 140 with engine 120)

Fig 1: Identifying Connection Diagram ME-SFI Fuel Injection And Ignition System - Shown On Model 140 With Engine 120

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		AH07.00-P-3000-01A
	Notes regarding test conditions when testing engine output and exhaust gas	The driven period is to be limited solely to the time required to read off the instruments (approx. 5 seconds for the output dynamometer; approx. 20 seconds for the exhaust emission test).	AH07.00-P-3003-01A
	Test and adjustment values	in HHT
		Engine 119	dh0a00pm00062x
		Engine 120	dh0a00pm00061x
		relevant HHT contents: Service (check engine performance)
1	Check and adjust engine		AR07.00-P-3001WA
2	Connect test equipment according to connection diagram
	Connection of diagnostic test equipment	Connect the HHT	AD00.00-P-2003A
		Handheld tester	*WH58.30-Z-1036-13A
		Test cable	*WH58.30-Z-1037-13A
		4-point analyzer with lambda calculation	*WE58.40-Z-1001-06A
		Test connection	Fig 3
		Tool for removing	Fig 4
		Adapter	Fig 5
		Exhaust probe	Figure
3	Secure front wheels	Place wheel chocks 100 mm in front of front wheels.
4	Ignition: OFF, detach clutch of ABS/ASR hydraulic unit in wheelhouse. ESP/ASR/ETS/ABS malfunction indicator lamp illuminates during driving. "Slip, ASR, control regulation" is shown in the multifunction display. After test, fit together plug connection and erase fault memory!	Models fitted with ABS/ASR/ESP/ASR/ETS/ABS
5	Direct air flow at radiator and underside of vehicle (oil pan, exhaust, 3-way catalytic converter, tires). Maintain a distance of approx. 1 m between blower and vehicle.	Danger of engine overheating
6	Warm up engine at part load, selector lever position "D" or 3rd gear at a load of about 25 kW	Engine oil temperature > 80°C. Do not exceed 120°C
7	Test engine oil temperature	Engine 112, 113 with HHT
8	Test coolant temperature	with HHT
9	Test idle speed	with HHT Selector lever position P/N AC and additional consumers switched off.
10	Test air mass	with HHT Engine: Idle
11	Test HFM voltage	with HHT
12	Test ignition angle	with HHT
13	Test injection time	with HHT Engine: Idle
14	Test camshaft solenoid	only Engine 104, 111
15	Test camshaft Hall sensor	with HHT
16	Test intake air temperature	with HHT
17	Test on/off ratio of purge valve	with HHT
18	Test battery voltage	with HHT
19	Test actuator	with HHT
20	Test pedal value sensor	with HHT
21	Test throttle valve angle	with HHT
22	Test idle speed and full throttle recognition	with HHT
23	Test WOT/CTP stop at pedal value sensor
24	Test knock sensor system enable	with HHT
25	Test knocking ignition angle	with HHT
26	Test knock sensor	with HHT
27	Test AC compressor	with HHT
28	Test transmission protection	with HHT
29	Test inertia fuel shutoff	with HHT
30	Test full load output	Drive at full load output only long enough to read off the instruments. Compare performance figures indicated with test and setting specifications. In this case, note barometer level, coolant temperature and intake air temperature.
		Use correction table for determining performance except engine 111.943, 111.944, 111.947, 111.973, 111.975	AH00.10-P-2010-02A
		Reference to capacity correction	AH00.10-P-2010-01A
31	Test exhaust emission values/lambda control	Test under load. Air cleaner installed. Engine approx. 80°C, cool down if necessary. Full load CO Upper part load CO (detach purge system), readout varies. Lower part load CO (detach purge system), readout varies. If catalytic converter is hot (engine oil > 100°C) a high conversion rate (or self-control) is reached, this produces a full load CO reading of > 1 % by vol. It is important to ensure that the full load is detected.
	Purge control valve, location/task/design/function		GF47.30-P-4030L
32.1	Test exhaust backpressure	Only conduct if necessary, if engine performance does not correspond to specification. Test under load. Remove lambda probe and install test connection 103 589 00 91 00, fit on pressure connection of tester. Coat test connection with hot lubricating paste, part no. 000 989 76 51.
33.1	Test charge pressure of engines fitted with supercharger.	Only conduct if necessary, if engine performance does not correspond to specification. Detach purge line at idle speed control actuator and connect pressure tester. only engine 111.943, 111.944, 111.947, 111.973, 111.975

Special tools 

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

Courtesy of MERCEDES-BENZ OF NORTH AMERICA.

Fig 3: Identifying Test Connection (103 589 00 91 00)

Courtesy of MERCEDES-BENZ OF NORTH AMERICA.

Fig 4: Identifying Wrench Socket (111 589 03 09 00)

Courtesy of MERCEDES-BENZ OF NORTH AMERICA.

Fig 5: Identifying Adapter (140 589 14 63 00)

Courtesy of MERCEDES-BENZ OF NORTH AMERICA.