Engine Electrical System Specifications (Mercedes-Benz M-Class W163)

Contents: OBD II 2nd Generation On-Board…↡ Body (automatic air conditioning…↡ Tightening force of threaded…↡

Note: Individual characteristics are also given in the text of the Chapter and, if their implementation is mandatory, are highlighted in bold.

Battery
Electrolyte density at 20°C, kg/dm³
Batteries of all types (for 62, 74 and 100 Ah)
Nominal value	1.24
Maximum permissible difference between banks	0.04
Load current (the test duration is no more than 10 seconds), A
62 Ah batteries	190
74 Ah batteries	265
100 Ah batteries	300
Voltage under load, V	10
Generator
Adjustable voltage (on the battery), IN
For a period of 2 minutes at an engine speed of 3000 rpm and with constant power consumption
Petrol models	13÷14.5
Diesel models	13÷14.5
Charging current (engine speed/ratio), A
Petrol models
Engine 111.977	90 (2200/2.93)
Engine 112.942	115 (2200/2.93)
Engine 112.970	120 (2500/3)
Engines 113.942/981	150 (2200/2.92)
Engine 113.965	150 (2500/3)
Diesel models
Engine 612.963	150 (2500/2.8)
Engine 628.963	150 (2500/3)
Ignition system
Type
Models ML 230	Electronic, HFM, Map-DIS, Bosch
Other models	Electronic, ME 2.0, Map-DI, Bosch
Setting the ignition timing	Under ECM control, not adjustable
Ignition coils
Engines 111.977	One coil assembly for two cylinders with wasted spark (twin-spark)
Engines of the 112 and 113 series	One dual coil per cylinder
Supply voltage (+ ballast), V	12.0
Firing order
4-cylinder engines	1-3-4-2
5-cylinder engines	1-2-4-5-3
6-cylinder engines	1-5-3-6-2-4
8-cylinder engines	1-5-4-8-6-3-7-2
Working clearance of the camshaft position sensor (CMP), mm	0.5
Spark plugs
Type/size of interelectrode gap, mm
ML 230
Bosch	F7DCR4/0.8
Beru	14FGH-7DTURXO/1.0
NGK	BKUR6ET-10/1.0
ML 320
Bosch	F8DPER4/1.0
Beru	14FGH-8DPRURX2/1.0
Champion	RC10PYP4/1.0
NGK	PFR5G-11/1.1
ML 350	No information available
ML 430
Bosch	F8DPER4/1.0
Beru	14FGH-8DPRURX2/1.0
NGK	PFR5G-11/1.1
ML 55 AMG	No information available
ML 500	No information available
Diesel Engine Management System
Type	Electronic with direct injection "Common-Rail", turbocharging and aftercooling
Glow plug type	Beru 858 MJ, Bosch 0 250 201 026, Lucas/CAV HDS352
Malfunction Indicator Lamp (MIL)	Flashes when there are misfires, lights up constantly when there are other malfunctions in the control system
Cylinder firing order
4-cylinder engines	1-3-4-2
5-cylinder engines	1-2-4-5-3

OBD II 2nd Generation On-Board Diagnostic Codes

Power unit

P0000	No fault codes in the system memory.
P0100	Malfunction in the intake air mass sensor (MAF) circuit. Right bank of cylinders.
P0105	Malfunctions in the intake air mass (MAF) sensor circuit. Right bank of cylinders.
P0110	Malfunction in the intake air temperature (IAT) sensor circuit. Right bank of cylinders.
P0115	No or excessively low signal level from the coolant temperature sensor (ECT). Right bank of cylinders.
P0120	Throttle Position Sensor (TPS) Circuit Malfunctions. Right Bank of Cylinder.
P0130	Malfunction in the pre-catalytic lambda probe circuit (right bank of cylinders). Right row of cylinders.
P0133	Pre-catalytic heated lambda probe voltage too high or response too slow (right bank of cylinders).
P0135	Malfunction in the pre-catalytic lambda probe heating circuit (excessively high voltage) (right bank of cylinders).
P0136	Malfunction in the post-catalytic heated lambda probe circuit (excessively low voltage) (right bank of cylinders).
P0140	Malfunction in the pre-catalytic lambda probe heating circuit (right bank of cylinders) (G3/4).
P0141	Malfunction in the heating circuit of the post-catalytic lambda probe (right bank of cylinders) (G3/6).
P0150	Malfunction in the pre-catalytic lambda probe circuit (left bank of cylinders).
P0153	Slow response of pre-catalytic lambda probe (left bank of cylinders).
P0155	Malfunction of the pre-catalytic lambda probe heater (left bank of cylinders) (G3/3).
P0156	Post-catalytic lambda probe is faulty (left bank of cylinders) (G3/5).
P0160	Malfunction of the pre-catalytic lambda probe heater (left bank of cylinders) (G3/3).
P0161	Malfunction of the post-catalytic lambda probe heater (left bank of cylinders) (G3/5).
P0170	Too lean or too rich of the air-fuel mixture (right bank of cylinders).
P0173	Lean or rich injection (left bank of cylinders).
P0201-P0212	Malfunction in the injector circuit of cylinders 1 - 12 respectively.
P0300	There are random misfires in various cylinders.
P0301-P0312	There are misfires in cylinders 1–12, respectively.
P0325	Knock sensor 1 is faulty (right bank of cylinders).
P0330	Knock sensor 2 is faulty (right bank of cylinders).
P0335	Malfunction in the circuit of the crankshaft position sensor SKR. Right row of cylinders.
P0341	Malfunction of the CMP sensor. Right row of cylinders.
P0370	Displacement of the camshaft phase relative to the crankshaft.
P0400	Exhaust gas recirculation flow malfunction.
P0410	Malfunction in the additional air mixing system.
P0422	The efficiency of the catalytic converter has been excessively reduced (right bank of cylinders).
P0432	The efficiency of the catalytic converter has been excessively reduced (left bank of cylinders).
P0440	Leaks in the EVAP fuel vapor recovery system.
P0441	The EVAP system VSV valve is faulty.
P0442	A minor leak has been detected in the EVAP system.
P0443-P0446	Malfunction in the EVAP canister purge control valve circuit.
P0450	Malfunction in the EVAP fuel vapor pressure sensor circuit.
P0455	A major leak has been detected in the EVAP system.
P0460	Low fuel level in tank.
P0462	Short circuit to ground in the fuel level sensor circuit.
P0500, P0501	Vehicle speed sensor VSS circuit malfunction.
P0507	Unexpected increase in engine speed when the idle speed stabilization system is activated.
P0560	Malfunction in the on-board electrical system.
P0565	Violation in generating the signal to turn on the cruise control.
P0600	AT control unit serial port malfunction.
P0604	RAM error in the control unit.
P0605	ROM error in the control unit.
P0700	Malfunction of the transmission control system.
P0702	Electrical fault in transmission control system circuit.
P0715	Malfunction in the input circuit of the turbine speed sensor circuit.
P0720	Malfunction in the speed sensor circuit.
P0730	Incorrect selection of AT gear.
P0740	Malfunction in the circuit of the solenoid valve of the TSS AT rotation converter.
P0743	Electrical failure in the torque converter clutch circuit.
P0748	Electrical fault in pressure control solenoid valve circuit.
P0753	Electrical fault in shift solenoid valve A circuit.
P0758	Electrical fault in shift solenoid valve B circuit.
P0763	Electrical fault in shift solenoid valve C circuit.
P0801	Engine/KV electric fan motor malfunction (M4/3).
P0802	Malfunction of the resonance intake manifold switching valve (Y22/6).
P0809	Displacement of the camshaft phase relative to the crankshaft.
P0811	The distributed CAN bus is blocked from the electronic ignition.
P1031	The lambda probes are connected incorrectly (G3/3 and G3/4).
P1177	Oil sensor malfunction (B40) (level, temperature, quality), oil temperature deviation.
P1178	Oil sensor malfunction (B40) (level, temperature, quality), oil level deviation.
P1179	Oil sensor malfunction (B40) (level, temperature, quality), deviation in oil quality.
P1180	Oil sensor malfunction (B40) (level, temperature, quality), excess oil temperature.
P1181	Engine/CB electric fan motor malfunction.
P1185	Oil sensor malfunction (B40) (level, temperature, quality), water in oil.
P1186	Fuel cut-off emergency signal. Activator M16/6 of electronic gas pedal/crankcase/idle speed stabilization.
P1225	Malfunction of the resonance intake manifold switching valve (Y22/6).
P1233	Activator M16/6 electronic gas pedal/cruise control/idle speed control.
P1386	Knock control from ECM.
P1400	The vacuum transmitter (Y31/1) of the EGR valve is faulty.
P1420	Switch valve (Y32) of the secondary air mixing system AIR pump.
P1453	Relay module (K40) for secondary air mixing system AIR, air pump (K40/4k3).
P1491	Too high refrigerant pressure KV.
P1542	Accelerator pedal sensor (B37).
P1570	Blocking launch attempt (rCL Remote Control Models); Violation of CAN signal compatibility from the driver identification control unit DAS to the ECM or EECM and DAS.
P1580	Activator (M16/1) of electronic gas pedal/cruise starter/idle speed control drive EA/CC/ISC.
P1584	Brake light switch (S9/1).
P1603	Distributed CAN data bus from EIS.
P1605	Bad driving conditions are identified by comparing driving speed signals.
P1642	Engine control unit ECM (N3/10) incorrect coding.
P1644	Due to low voltage of the transmission control unit (N15/3), it is not possible to determine the transmission version.
P1681	Lost collision signal.
P1747	Distributed bus (CAN) signal error from the ETC transmission control unit (N15 / 3) or dashboard.
Chassis (aBS/ASR/ESP/BAS systems)
C1000	ESP/SPS control unit (N47-5). After replacement, adapt the control unit.
C1003	ESP control unit (N47–5), BAS system computer malfunction.
C1010	Low supply voltage, circuit 87.
C1011	Open/short circuit in the power supply circuit of the auxiliary brake system hydraulic unit solenoid valve.
C1012	Increased battery voltage at terminal 87.
C1020	Distributed CAN data bus communication fault. Check control unit coding.
C1022	Distributed data bus communication fault with engine control unit MSM (N3/5) or CDI (N3/9).
C1023	Distributed data bus communication fault with left engine control unit (ME-SFI, N3/11).
C1024	Distributed data bus communication fault with transmission control unit (N15/3).
C1025	Communication failure via CAN bus with the BAS system control unit.
C1026	General communication failure on the CAN bus.
C1038	CAN bus: Transmission from the ESP system control unit (N47-5) is disrupted.
C1040	CAN bus: Transmission from the ESP system control unit (N47-5) is disrupted.
C1100	Break, poor contact, damage to the rotor teeth of the vehicle speed sensor on the left front wheel (L6/1), different wheel size, incorrect final drive ratio.
C1101	Break, poor contact, damage to the rotor teeth of the vehicle speed sensor on the right front wheel (L6/2), different wheel size, incorrect final drive ratio.
C1102	Broken, poor contact, damaged teeth of the rotor of the vehicle speed sensor on the left rear wheel (L6/3), different wheel size, incorrect gear ratio of the final drive.
C1103	Broken, poor contact, damaged teeth of the rotor of the vehicle speed sensor on the left rear wheel (L6/4), different wheel size, incorrect gear ratio of the final drive.
C1112	Speed sensor: magnetic leakage flux is intermittently affected. Check the wires.
C1120	Open circuit, short circuit in the reference or working signal wire of the ESP stability control sensor (N64) or (B24/15).
C1140	Open circuit, short circuit, initialization of the steering angle sensor (N49). After replacing the components, perform adaptation of the control unit. Turn the steering wheel from lock to lock.
C1141	ESP brake pressure sensor (B34) or ESP pressure sensor 1 (B34/1).
C1142	Open circuit, short circuit in the ABS lateral acceleration sensor circuit (B24/2) or the rotation and lateral acceleration sensor (B24/15)
C1143	Open circuit, short circuit or malfunction of ESP pressure sensor 2 (B34/2).
C1149	Supply voltage for sensors: ESP brake pressure (B34), diaphragm stroke (A7/7b1), lateral acceleration (B24/2) or rotational speed and lateral acceleration (B24/15).
C1200	Open circuit, short circuit, malfunction of the 4-pin brake light switch sensor (S9/1).
C1201	Open circuit, short circuit or fault, delay in switching of BAS system switch (A7/7s1).
C1204	Open circuit, short circuit, malfunction of the BAS system membrane stroke sensor (A7/7b1).
C1300	Open circuit, short circuit in the circuit of the holding solenoid valve of the left front wheel (A7/3y6).
C1301	Open circuit, short circuit of the left front wheel release solenoid valve circuit (A7/3y7).
C1302	Open circuit, short circuit in the circuit of the retaining solenoid valve of the right front wheel (A7/3y8).
C1303	Open circuit, short circuit of the release solenoid valve of the right front wheel (A7/3y9).
C1304	Open circuit, short circuit of the circuit of the holding solenoid valve of the left rear wheel (A7/3y10).
C1305	Open circuit, short circuit in the circuit of the release solenoid valve of the left rear wheel (A7/3y11).
C1306	Open circuit, short circuit in the circuit of the retaining solenoid valve of the right rear wheel (A7/3y12).
C1307	Open circuit, short circuit in the circuit of the release solenoid valve of the right rear wheel (A7/3y13).
C1308	Open circuit, short circuit in the circuit of the outlet solenoid valve of the pressure circuit 1 (A7/3y26), front wheels.
C1309	Open circuit, short circuit in the circuit of the inlet solenoid valve of the pressure circuit 2 (A7/3y27), rear wheels.
C1310	Open circuit, short circuit in the circuit of the pressure circuit switching valve 1 (A7/3y24) of the front wheels.
C1311	Open circuit, short circuit in the circuit of the pressure circuit switching valve 2 (A7/3y25), rear wheels.
C1312	Master brake cylinder switching valve.
C1313	Hydraulic unit solenoid valve relay. Replace the control unit.
C1316	Open circuit or short circuit in the changeover solenoid valve circuit, pressure circuit 1 (A7/3y24).
C1317	Open or short circuit in the inlet solenoid valve circuit, pressure circuit 1 (A7/3y26).
C1318	Open or short circuit in the changeover solenoid valve circuit, pressure circuit 2 (A7/3y25).
C1319	Open or short circuit in the inlet solenoid valve circuit, pressure circuit 2 (A7/3y27).
C1332	Open or short circuit in the BAS system solenoid valve circuit (A7/7y1).
C1400	Open circuit, short circuit in the ESP pump circuit.
C1401	Open, short circuit or failure to turn off the high pressure pump/valve body return circuit (A7/3m1).
C1405	Malfunction of actuators of pressure circuits 1 and 2.
C1406	The BAS emergency brake assist (A7/7), diaphragm stroke sensor (A7/7b1) or solenoid valve (A7/7y1) is faulty.
C1500	Vehicle speed sensor VSS.
C1501	SPS pressure sensor.
C1503	Piston pressure transfer unit. Check the condition of the rear brake pads.
C1504	The system is disabled. Steering angle sensor (N49) is not initialized, low voltage of the ESP stability sensor. Turn the steering wheel from lock to lock. Rotational speed sensor (N64) or rotational speed and lateral acceleration sensor (B24/15), low voltage.
C1511	The engine control unit is incorrectly coded.
C1540	Road test not conducted.
Security systems
Without side airbags (control unit code starts with 000)
1	Security system control unit.
2	Open or short circuit in the driver's airbag ignition circuit.
3	Open or short circuit in the driver's belt tensioner ignition circuit.
4	Open or short circuit in the front passenger seat belt tensioner ignition circuit.
5	Open or short circuit in the front passenger airbag ignition circuit.
10	The control unit programming does not match the vehicle version.
17	Low supply voltage (15R circuit).
19	Open or short circuit to positive in the safety system warning lamp circuit.
20	Front passenger seat occupancy sensor - airbag activation.
24	Driver seat belt fastening sensor (uS models).
25	Front passenger seat belt fastener sensor (uS models).
73	Open or short circuit of the ignition circuits.
With side airbags (control unit code starts with 001)
1	Security system control unit.
2	Open or short circuit to positive in the safety system warning lamp circuit.
3	Low supply voltage.
4	Open or short circuit in driver's airbag ignition circuit, control unit programming.
5	Open or short circuit in the driver's belt tensioner ignition circuit, control unit programming.
6	Open or short circuit in the front passenger seat belt tensioner ignition circuit, control unit programming.
7	Open or short circuit in the front passenger airbag ignition circuit, control unit programming.
8	Open or short circuit in the driver's side airbag ignition circuit, programming of the control unit.
9	Open or short circuit in the front passenger side airbag ignition circuit, control unit programming.
16	Driver seat belt fastening sensor (uS models). Programming the control unit.
17	Front passenger seat belt fastener sensor (uS models). Programming the control unit.
18	Left side airbag wiring fault.
19	Open, short, or low voltage in the left side airbag crash sensor circuit.
20	Open, short, or low voltage in the left side airbag crash sensor circuit.
21	Right side airbag wiring fault.
22	Open, short, or low voltage in the right side airbag crash sensor circuit.
23	Open, short, or low voltage in the right side airbag crash sensor circuit.
24	Seat occupancy sensor - activation of front airbags.
25	Front passenger seat occupancy sensor - activation of the front airbag.
26	Programming the control unit.
27	Open or short circuit in the front passenger seat occupied sensor with child restraint system (ACSR) circuit.
28	Front passenger seat occupied sensor with child seat installation sensor (ACSR). Child seat not installed correctly or child seat not connected to passenger seat. Metal objects on passenger or child seat. Nearby electromagnetic emitter (telephone, transmitter, etc.).
29	Programming the control unit.
31	Front passenger seat occupancy sensor with child seat position sensor (ACSR).
32	Damage in the left side airbag crash sensor circuit (A53).
33	Damage in the right side airbag crash sensor circuit.
34	Digital Crash Output - Wiring Fault (ARTHUR). Control Unit Programming.
35	Analog Crash Output - Wiring Damage (model 170 Kompressor).
B1558	Child seat installation indicator light.
B1559	Child restraint system (ACSR) information signal.

Body (automatic air conditioning system)

Display	Tester	OBD II
FF	No registered faults.
26	B1026	Air conditioning in the rear compartment. Transmission via the distributed CAN data bus.
226	B1226	Sensor for temperature of air in the passenger compartment supplied by the fan (B10/4).
227	B1227	Outside air temperature indicator sensor (B14).
228	B1228	Left heater temperature sensor (B10/2).
229	B1229	Right heater temperature sensor (B10/2).
230	B1230	Evaporator temperature sensor (B10/6).
231	B1231	Coolant temperature sensor (B11/4).
232	B1232	Refrigerant pressure sensor (B12).
233	B1233	Coolant temperature sensor (B12/1).
234	B1234	Solar radiation sensor (B32).
235	B1235	Emission sensor (B31).
241	B1241	Add refrigerant.
416	B1416	Coolant circulation pump (A31m1).
417	B1417	Double water valve left (A31/1y1).
418	B1418	Double water valve right (A31/1y2).
419	B1419	Electromagnetic clutch (A9k1).
420	B1420	Idle speed controller.
421	B1421	Additional fan control unit (N65/1).
422	B1422	Serial interface to the instrument panel (K1).
423	B1423	Shift valve block (Y11).
424	B1424	Actuator motor for opening activated carbon filter (A32m².
425	B1425	Actuator motor for closing the activated carbon filter (A32m²).
432	B1432	Additional heater. Maximum heating.
459	B1459	Serial interface to the instrument cluster (K2).
460	B1460	LED - central air deflector, "Heating" position.
461	B1461	LED - central air deflector, "Cooling" position.
462	B1462	Full load signal diesel models.

Tightening force of threaded connections, Nm

Petrol models
Spark plugs	20÷30
Bolts for fastening protective screens of battery compartment to body element	20
Bolts for fastening coil assemblies	8
Mounting the crankshaft position (CKP) sensor to the cylinder block	8
Fastening the Hall sensor to the cylinder head (engines of series 112 and 113)	8
Knock sensor mounting bolts (KS)	20
Terminal nut for fastening the battery ground busbar to the body element	18
Generator B+ terminal nut
Engine 11.977	15
Engines of the 112 and 113 series	18
Generator D+ terminal nut
Engine 11.977	4
Engines of the 112 and 113 series	5
Generator mounting bolts	42
Generator Drive Pulley Fastening Nut	80
Nut securing terminal 30 of starter circuit	14
Nut securing terminal 50 of starter circuit	6
Starter mounting bolts	42
Bolts for fastening the cushion to the powertrain suspension support bracket	65
Diesel models
Cylinder Head Cover Trim Panel Fastening Screws	10
Air Distributor Trim Panel Fastening Screws	10
Bolts for fastening protective screens of battery compartment to body element	20
Mounting the Camshaft Position (CMP) Sensor (hall sensor) on the cylinder head cover (engine 612.963)	11
Glow plugs	12
Terminal nut for fastening the battery ground busbar to the body element	18
Bolt securing oil feed pipe to turbocharger	30
Bolts for fastening the generator cooler casing to the engine block (M8)	20
Generator B+ terminal nut	13
Generator mounting bolts	42
Generator Drive Pulley Fastening Nut	80
Nut securing terminal 30 of starter circuit	14
Nut securing terminal 50 of starter circuit	6
Starter mounting bolts	42