1997 MERCEDES-BENZ ML320 engine

plate (1) must coincide with one of the markings. Due to unequal length of timing chai n paths, the engine must be cranked up to 14 times until the copper
plates are matched again with the markings.
CAMSHAFT CODE NUMBER AND ASSIGNMENT - AH05.20-N-0100-01A
Engine 111, 112, 113
Inspection data of camshaft code numbers
Inspection data for camshaft code numbers
Inspection data for camshaft code numbers
Engine 112, 113
The camshaft code number is located at the flange for the camshaft sprockets (arrow).
Shown on camshaft for engine 112.
NumberDesignationEngine 111.948Engine 111.978
BE05.20-N-1001-
01ACamshaft code
numbersIntake1616
Exhaust2417
BE05.20-N-1002-
01ACamshaft code
numbers repair
camshaftIntake1919
Exhaust2520
NumberDesignationEngines
113.940//
941/942943Engine
113.944Engine
113.960 with
code 479
Engine 113.960
without Code 479
BE05.20-P-
1001-01GLeft camshaft
code number04/28/34/52413206/10/29/36/54
BE05.20-P-
1002-01GRight camshaft
code number05/30/35/53403307/11/31/37/55
NumberDesignationEngines
113.961/962/963Engines
113.980/981/984Engine
113.987/988/98
9/990/991
BE05.20-P-1001-
01GLeft camshaft code
number06/10/29/36/543961
BE05.20-P-1002-
01GRight camshaft
code number07/11/31/37/553860

2004 Mercedes-Benz ML350
1998-2005 ENGINE Engine timing - 163 Chassis
me
Saturday, October 02, 2010 3:39:37 PMPage 3 © 2006 Mitchell Repair Information Company, LLC.

Fig. 2: Locating Camshaft Code Number - Shown On Camshaft For Engine 112
NOTES ON INSTALLING CAMSHAFT BEARING BRIDGE - AH05.20-P-2000-01AV
Engines 112, 113 except 113.960, 113.960 except cylind er shutoff codes 479, 113.962/982/993, 112.951/976
Pay attention to the following notes before installing the camshaft bearing bridges:
Lubricate the camshaft bearings.
Due to tolerance reasons, the camshafts must not be replaced individually.
If the camshaft bearing bridge is damaged, replace th e cylinder head complete with the camshaft bearing
bridge.
It not permitted to reuse the bolts M7 X84; these must always be replaced.
Pay attention to tightening torque, slackening di agram and tightening diagram of the bolts M7x84.
Shown on engine 112
Fig. 3: Identifying Camshaft Bearings Bridge Bolts

BASIC KNOWLEDGE
DESIGN OF CHAIN TENS IONER - GF05.10-P-7801-01A

2004 Mercedes-Benz ML350
1998-2005 ENGINE Engine timing - 163 Chassis
me
Saturday, October 02, 2010 3:39:37 PMPage 4 © 2006 Mitchell Repair Information Company, LLC.

Engines 112, 113
Shown on engine 112
Fig. 4: Identifying Desi gn Of Chain Tensioner
- Engines 112, 113
TIMING CHAIN DRIVE, GENERAL - GF05.10-P-9611-01C
Engine 112, 113
Shown on engine 112

2004 Mercedes-Benz ML350
1998-2005 ENGINE Engine timing - 163 Chassis
me
Saturday, October 02, 2010 3:39:37 PMPage 5 © 2006 Mitchell Repair Information Company, LLC.

Fig. 5: Identifying Timing, Markings - Shown On Engine 112
Engine timing
The basic setting is 40° after TDC.
At 40° after TDC the grooves (6) in th e left and right camshafts point in the direction of the inner V and are
centered on the parting surface of the cylinder head cover. The copper-plated lugs (1) and marks on the
camshaft sprockets (4 and 5) coincide.
The groove in the crankshaft (2) and the mark on the ba lance shaft sprocket (3) point toward one anther and
both coincide with the copper-plated lugs (1).
Rubber-coated sprockets
In order to improve the noise characteristic of the timing case drive the chain sprockets on the crankshaft,
balance shaft and camshafts are rubber-coated.
Only on engine 112
6 mm dia. locating holes (a) are located coinciding with one anther in the rear balancing weight on the balance
shaft and rear of the crankcase.
Repair note
Due to the difference in the timin
g chain paths it may be necessary to crank the engine up to 14 times before the

2004 Mercedes-Benz ML350
1998-2005 ENGINE Engine timing - 163 Chassis
me
Saturday, October 02, 2010 3:39:37 PMPage 6 © 2006 Mitchell Repair Information Company, LLC.

marks on the camshafts coincide again.
Fig. 6: Identifying Holes
- Only On Engine 112
Only on engine 112
Checking the balance shaft with engine assembled
Two marks, one at the front of the crankcase and the ot her on the end of the balancing weight, point toward one
anther and can be seen through the left timing case shaft approx. 22 cm. below the parting surface of the
cylinder head cover when the cylinder head cover is removed.
Fig. 7: Identifying Two Mark s On Front Of Crankcase

SAFETY PRECAUTIONS
SAFETY INFORMATION: ENGI NE TIMING - AS05.00-Z-9999ZZ
MODEL all

2004 Mercedes-Benz ML350
1998-2005 ENGINE Engine timing - 163 Chassis
me
Saturday, October 02, 2010 3:39:37 PMPage 7 © 2006 Mitchell Repair Information Company, LLC.

RISK OF EXPLOSION AND PO ISONING - AS05.30-Z-0001-01A
Do not open sodium-filled valves. Wear protectiv e gloves and safety glasses when handling damaged
valves.
Exhaust valves fill ed with sodium
Potential risks
Risk of explosion
Explosion may occur when melting down sodium-filled va lves. Sodium has a very low self-ignition temperature
(121 °C) and may spontaneously ignite in moist air.
Improper disposal may lead to fires due to moisture in scrap containers.
Risk of poisoning
The inhalation of toxic vapors causes severe irritation, shortness of breath, headaches, nausea and vomiting.
Risk of injury
Leaked sodium that comes into contact with moist body tissue (perspiration on hands, tears) may undergo a
severe, explosive reaction and generate heat. This may lead to skin ir ritation and burns, and to corneal damage
with possible blinding.
Safety instructions/precautions
Keep water and sources of heat and ignition away from sodium.
When handling damaged, sodium-filled valves, wear su itable protective gloves and safety glasses, if
necessary.
Never machine sodium-filled valves.
Do not open sodium-filled valves.
Observe all additional safety requireme nts and regulations in your country.
First aid measures
Skin and eye contact
Remove sodium, treat the injured area with an oily solution, e.g. Biseptol and consult a physician.

Risk of explosion and poisoning caused by the melting down
or improper handling of sodium-f illed valves. Risk of injury
caused by skin contact with s odium resulting in heat or
chemical burns.ENGINE 111, 112, 113,
137, 155, 156, 166, 266,
646, 647, 648 ...AS05.30-Z-
0001-01A

2004 Mercedes-Benz ML350
1998-2005 ENGINE Engine timing - 163 Chassis
me
Saturday, October 02, 2010 3:39:37 PMPage 8 © 2006 Mitchell Repair Information Company, LLC.

Ingestion
Do not give the affected person a nything to drink, consult a physician.
Vapor inhalation
Move the victim out of the risk area.
If victim has the urge to vomit, give him/her oxygen.
In the event of respiratory failure, administ er artificial respiration and notify a physician.
TESTING & REPAIR
REMOVE/INSTALL HYDRAULIC VALVE CLEARANC E COMPENSATION ELEMENTS - AR05.00-P-2011B
ENGINE 112.945 in MODEL 463.209 /232 /233 /244 /245 /250
ENGINE 112 in MODEL 129, 163, 170, 202, 203, 208, 209, 210, 220
ENGINE 113.962 in MODEL 463.206 /240 /241 /247 /248 /249 /254
ENGINE 113 in MODEL 129, 163, 202, 203, 208, 209, 210, 215, 220, 230.474 /475
ENGINE 112.913 in MODEL 211.061/261
ENGINE 112.949 in MODEL 211.065/265
ENGINE 113.967 in MODEL 211.070/270
ENGINE 113.982 in MODEL 463.243/246
ENGINE 113.990 in MODEL 211.076/276

2004 Mercedes-Benz ML350
1998-2005 ENGINE Engine timing - 163 Chassis
me
Saturday, October 02, 2010 3:39:37 PMPage 9 © 2006 Mitchell Repair Information Company, LLC.

Fig. 8: Identifying Hydraulic Valve Clea rance Compensation Element Components - Shown On Engine
112 In Model 210
Shown on engine 112 in model 210

Remove/Install
1
Remove cylinder
head covers with
ignition coils (6)Air cleaner mounted on vehicle.AR01.20-
P-5014B
Air cleaner positione d at engine side.
AR01.20-
P-
5014BV
2
Position
crankshaft to 0°
after ignition
TDC of cylinder
1
The engine must not be turned back; otherwise the chain can get
jammed.
AR05.10-
P-6858V
Model 129,
463.206/209/232/233/240/241/243/2 44/245/246/247/248/249/250/254,
Model 163 except 163.174/175, Model 202, 208, 210 with engine 113AR05.10-
P-7800C
Model 163.174/175, Model 209 with engine 113.987 up to 23.4.04, AR05.10-

2004 Mercedes-Benz ML350
1998-2005 ENGINE Engine timing - 163 Chassis
me
Saturday, October 02, 2010 3:39:37 PMPage 10 © 2006 Mitchell Repair Information Company, LLC.