ignition MERCEDES-BENZ ML320 1997 Complete Manual Online

Operation
The steering lock interlock prevents the ignition key being removed when the parking lock is not engaged.
The locking pawl (39) is positioned on the exterior contour of the detent plate (38) if the parking lock is not
engaged and if the brake pedal is not depressed. See Fig. 20
.
The cables (53, 54) hold the locking valve (60) in its position in front of the locking cam (61) against the force
of the pressure spring. Therefore, the ignition key cannot be turned to the "0" position.
In selector lever position "P" and with the brake pedal in the rest position, the force of the return spring (57) can
pull the locking pawl (39) under the stop at the detent plate (38) and the pressure spring (62) simultaneously
pulls the locking valve (60) away from the locking cam (61).
The ignition key can now be turned to the "0" position and removed from the ignition.
The design of the parking lock interlock is the same as for the steering lock interlock and it functions with
reciprocal action to the steering lock interlock.
Parking Lock, Location/Task/Design/Function

See PARKING LOCK, LOCATION/TASK/DESIGN/FUNCTION
.
Parking Lock, Location/Task/Design/Function

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1998-03 AUTOMATIC TRANSMISSIONS Complete Transmissions - ML 320 - 722.662
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See MODULATING PRESSURE, FUNCTION
.
Shift Valve Pressure, Function

See SHIFT VALVE PRESSURE, FUNCTION
.
Lubricating Pressure, Function

See LUBRICATING PRESSURE, FUNCTION
.
Regulating Valve Pressure, Function

See REGULATING VALVE PRESSURE, FUNCTION
.
Limp-Home Mode, Function
Operation
In order to ensure a safe driving state and to prevent damage to the automatic transmission, the ECT control
module (N15/3) switches to limp-home mode in the event of critical faults. A fault code assigned to the fault is
stored in memory.
All solenoid and regulating valves are thus de-energized.
Effect
The gear last engaged remains engaged.
The modulating pressure and shift pressure rise to the maximum levels.
The torque converter lockup clutch is switched off.
In order to preserve the operability of the vehicle to some extent, the hydraulic control can be used to engage
2nd gear or reverse:
Stop Vehicle
Switch Off Engine
Move Selector Lever To "P"
Wait At Least 10 Seconds
Start Engine
Move Selector Lever To "D": 2Nd Gear
Move Selector Lever To "R"
The limp-home function remains active until the fault is rectified or the stored fault code is erased. Sporadic
faults can be reset via ignition OFF/ON.

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When the kick-down switch (S16/6) is operated via the accelerator pedal a signal is passed on to the ETC
control module (N15/3). Based on this information the ETC control module (N15/3) actuates the solenoid
valves so that the upshifts and downshifts take place at higher engine speed.
Shift-Lock Function
Operation
The term shift lock combines the functions which, in addition to the parking brake, offer an additional safeguard
for the vehicle to prevent it moving off unintentionally.
These include the functions of locking the selector lever position "P" and locking the ignition lock as well as the
parking lock in the transmission.
The shift lock function only allows shifting out of selector lever position "P" if the transmitter key (A8/1) has
been turned into the position "Ignition: ON" and the brake pedal is depressed.
In order to ensure that after parking the vehicle the selector lever is shifted into selector lever position "P", the
transmitter key (A8/1) can only be turned towards "0" in this position and removed from the EZS control
module (N73) (ignition lock locking, function).
The vehicle is secured mechanically by blocking the park pawl gear.
In the event of mechanical or electrical/electronic faults it is possible to unlock selector lever position "P"
manually (shift lock override function).
Function Of Locking Of Selector Lever Position "P"

See FUNCTION OF LOCKING OF SELECTOR LEVER POSITION "P"
.
Ignition Lock Locking, Function

See IGNITION LOCK INTERLOCK
.
Function Of Shift Lock Override

See FUNCTION OF SHIFT LOCK OVERRIDE
.
Function Of Locking Of Selector Lever Position "P" (With Touch Shift)
Operation

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1998-03 AUTOMATIC TRANSMISSIONS Complete Transmissions - ML 320 - 722.662
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ignition key position Ignition "ON" when the brake pedal is depressed and therefore when the brake lamp
switch (S9/1) is actuated and when selector lever position "P" is recognized.
The R/P locking magnet (89) releases the selector lever thus allowing the selector lever to be moved away from
position "P".
Parking Lock, Location/Task/Design/Function - See PARK PAWL,
LOCATION/TASK/DESIGN/FUNCTION.
Ignition Lock Interlock
Operation

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Fig. 163: Ignition Lock Interlock

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1998-03 AUTOMATIC TRANSMI SSIONS Complete Transmissions - ML 320 - 722.662
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Courtesy of MERCEDES-BENZ OF NORTH AMERICA.
The mechanism of the ignition lock interlock connects the selector lever of the floor shift with the ETC control
module (N73). See Fig. 163
. It prevents the transmitter key (A8/1) from being withdrawn when the selector
lever is not at position "P".
When the parking lock is not engaged (selector lever position "D", "R", "N"), the locking valve (60) locks the
locking cam (61). The compression spring (62) only pulls the locking valve (60) away from the locking cam
(61) in selector lever position "P". The transmitter key (A8/1) can now be turned to position "0" and removed
from the ignition.
Parking Lock, Location/Task/Design/Function

See PARK PAWL, LOCATION/TASK/DESIGN/FUNCTION
.
Function Of Shift lock Override
Transmission with touch shift 722.6 in MODEL 163
Operation

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See OIL LEVEL CONTROL, FUNCTION
.
Function of Torque Converter Lockup Clutch Control

See FUNCTION OF TORQUE CONVERTER LOCKUP CLUTCH CONTROL
.
Torque Converter Lockup Clutch Control Pressure, Function

See TORQUE CONVERTER LOCKUP CLUTCH CONTROL PRESSURE, FUNCTION
.
Function Of Locking Of Selector Lever Position "P"

See FUNCTION OF LOCKING OF SELECTOR LEVER POSITION "P"
.
Ignition Lock Locking, Function

See IGNITION LOCK INTERLOCK
.
Function Of Shift Lock Override

See FUNCTION OF SHIFT LOCK OVERRIDE
.
Survey Of System Components, Automatic Transmission, Location/Task/Design/Function

See SURVEY OF SYSTEM COMPONENTS, AUTOMATIC TRANSMISSION,
LOCATION/TASK/DESIGN/FUNCTION.

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AR54.10-P-0005GH
Remove/install battery
23.3.00

MODEL
163.113 /128 /136 /154 /157 /172 /174 /175

P54.10-2066-06

Right-hand drive vehicle shown

1
Ground line

2
Positive wire

3
Seal

4
Shield

5
Alternator line

6
Starter line

7
Brake booster line

8
Overflow hose

9
Control cable

10
Suction fan locking bracket

11
Bolt

12
Clamping wedge

13
Retaining bracket

G1 Battery

M13
Heating water circulation pump


Remove, Install

Danger!

Risk of explosion
from electrolytic gas.
Risk

of poisoning and irritation
if battery acid is

swallowed.
Risk of injury
through burns to

skin and eyes from battery acid or when

handling damaged lead-acid batteries
No fire, sparks, naked flames or smoking.

Wear acid-resistant gloves, clothing and eye

protection. Pour battery electrolyte only into

suitable and appropriately marked containers.

AS54.10-Z-0001-01A

Notes on battery
All models

AH54.10-P-0001-01A

1
Turn ignition key to position "0"

to avoid fault codes.

2
Disconnect ground cable (1) from battery


To prevent unintended contact, insulate

the ground lead cable lug.

AR54.10-P-0003A

3
Remove protective shield at positive pole of

battery and remove all lines attached to

positive cable (2)

4
Disconnect positive cable (2) from the battery

(G1).

5
Remove seal (3) at shield (4)

6.1
Unscrew bolt for securing generator line to

shield

As of VIN A145273, X708319.

7
Slacken retaining clip at side of shield (4),

guide all lines through shield and lay to one

side

8.1
Detach coolant circulation pump (M13) from

shield

As of VIN A145273, X708319.

9
Remove cable strap at lines at side of shield

10
Detach overflow hose (8) and control cable

(9) at shield

11.1
Detach locking bracket of suction fan (10) at

the front from the shield and remove line from

shield

Only if fitted.

12
Unscrew bolt (11) at shield


*BA54.10-P-1002-01A

13
Remove clamping wedge (12) at retaining

bracket

14
Detach retaining bracket (13) by pressing

downwards

15
Detach and remove shield (4)

Rotate the shield forwards and move back

in order to loosen the front retaining lugs.

16
Remove battery (G1).

17.1
Dispose of battery

If battery is defective.

o

Dispose of battery
All models

OS54.10-P-0001-01Z

18
Install in the reverse order

Copyright DaimlerChrysler AG 05.06.2006 CD-Ausgabe G/10/04 . This WIS print-out will not be recorde
d by Modification services.
Page 1

XENON HEADLAMPS, FUNCTION - GF82.10-P-2007-01GH
Function
The combustion chamber of the xenon lamp is filled with xenon and a mixture of metal halide salts. This
mixture is ignited by high voltage. The color of the light has a characteristic similar to daylight.
When the low beam lamps are switched on the xenon headlamp control module (E1 n1, E2n1) activates the
xenon headlamp control module and ignition module (E1n2, E2n2) via the control voltage within a few
milliseconds.
As a result of a high voltage surge (approx. 20 kV) of the ignition device, an arc forms between the electrodes,
and the xenon lamp is ignited.
When an arc of sufficient stability is detected, the control electronics of the xenon lamp control module (E1n1,
E2n1) switches over to power-limiting mode. The electric power is regulated to 35 W. A voltage converter
generates the voltage of approx. 85 V (~) necessary for the reliable function of the xenon lamp. For technical
reasons the xenon lamp has a timed startup characteristic. After switching on, 50 % of the luminosity is reached
within 1 to 2 seconds and full luminosity is reached after approx. 30 seconds.
Model 163, up to
31.08.01GF82.10-P-0001GH
Model 163 as of
1.09.01GF82.10-P-
0001GHA
Xenon headlamps, functionModel 163, up to
31.08.01GF82.10-P-2007-
01GH
Model 163 as of
1.09.01GF82.10-P-2007-
01GHA
Automatic driving light actuation,
functionModel 163 as of
01.09.01GF82.10-P-3003GH
Daytime running light control, functionModel 163 as of
01.09.01GF82.10-P-3005GH
Locator lighting, functionModel 163 as of
01.09.01GF80.20-P-2008GH
Headlamp cut-in, functionModel 163 as of
01.09.01GF80.20-P-2003GH
Daytime running lights, functionModel 202 with
Code 236a special
lamp circuit for
daytime running
lampsGF82.10-P-2002A
Contents - Function description of
exterior lighting,
location/task/design/functionModels 129, 140,
163, 202, 208, 210
with code 612b
xenon headlamp unitGF82.10-P-9999B

2001 Mercedes-Benz ML320
1998-2005 ACCESSORIES & BODY, CAB Electrical System - Body - 163 Chassis
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XENON HEADLAMPS, FUNCTION - GF82.10-P-2007-01GHA
The lighting technology, known as bi-xenon 70 , is located in the outer headlamps.
When the low beam lamps are switched on the xenon headlamp control module (E1 n1, E2n1) activates the
xenon headlamp control module and ignition module (E1n2, E2n2) via the control voltage within a few
milliseconds.
A high-voltage surge from the ignition device ignites the xenon lamps, and in doing so an electric arc is formed
between the electrodes. When an arc of sufficient stability is detected, the control electronics of the control
module (E1 n1, E2n1) switches over to power-limiting mode.
The light generated previously in a gas discharge lamp (D2S lamp) is not reflected in bi-xenon 70 headlamps,
but instead it is sent directly through a lens optical system with a lens diameter of 70 mm.
Using the mask (B), which is positioned between the gas discharge lamp and the lens optical system, the beam
of light is partially masked for the low beam so that oncoming traffic is not blinded.
For the high beam, the mask (B) is electro-mechanically folded to the side using the solenoid (M).
If the solenoid (M) should fail or a supply line breaks, the mask (B) remains mechanically held in the low
beam position, always between the gas discharge lamp and the lens optical system.
In order to make the extremely bright light more acceptable to other road users, the lens aperture area with its
dotted characteristic is optically enlarged.
This is possible on account of the specially formed areas which surround the lens. In addition, the light can pass
through a number of chrome-plated strips from the rear. A portion of the diffused light is intercepted by the
lower section of the surface area and reflected to the upper section of the chrome-plated longitudinal strips.

For technical reasons the xenon lamp has a timed startup characteristic. After switch on, 50 % of the luminosity
is reached within 1 to 2 seconds and full luminosity is achieved after another approx. 30 seconds.
XENON HEADLAMP, LOCATION/DESIGN/FUNCTION - GF82.10-P-2007GH
MODELS 163.113 /136 /154 /172 up to 31.08.01 with CODE (612b) xenon headlamp unit with CODE
(U47) conversion package
MODELS 163.174 up to 31.08.01, 163.113 /128 /136 /154 /172 as of 01.09.01
Design:
From model
year 2002 (as of 1.9.01) the xenon headlamps are installed as standard.

2001 Mercedes-Benz ML320
1998-2005 ACCESSORIES & BODY, CAB Electrical System - Body - 163 Chassis
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