Mercedes-Benz ML320. Manual — part 351

2001-04 STARTING & CHARGING SYSTEMS

Generators & Regulators - 163 Chassis

IDENTIFICATION

CHASSIS & ENGINE IDENTIFICATION

DESCRIPTION

Bosch generators are available in various amp ratings depending on engine application. Voltage regulators are
transistorized and internal to generator. See GENERATOR APPLICATION table.

GENERATOR APPLICATION

ADJUSTMENTS

DRIVE BELT ROUTING

For drive belt routing, see Fig. 1 .

WARNING:

Vehicles are equipped with air bag supplemental restraint system. Before
attempting any repairs involving steering column, instrument panel or
related components, see SERVICE PRECAUTIONS (or AIR BAG SAFETY
PRECAUTIONS) and DISABLING & ACTIVATING AIR BAG SYSTEM in
appropriate AIR BAG RESTRAINT SYSTEMS article.

NOTE:

When the battery is disconnected, vehicle computer and memory system may
lose data. Driveability problems may exist until computer systems have
completed a relearn cycle.

Model (Year)

Chassis

Engine

ML55 AMG (2001-03)

163.174

113.981

ML320 (2001-02)

163.154

112.942

ML350 (2003-04)

163.157

112.970

ML430 (2001)

163.172

113.942

ML500 (2002-04)

163.175

113.965

Application

Amp Rating

V6

115

V8

150

NOTE:

Vehicles have automatic belt tensioners. No adjustment is necessary.

2001 Mercedes-Benz ML320

2001-04 STARTING & CHARGING SYSTEMS Generators & Regulators - 163 Chassis

2001 Mercedes-Benz ML320

2001-04 STARTING & CHARGING SYSTEMS Generators & Regulators - 163 Chassis

me

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2001 Mercedes-Benz ML320

2001-04 STARTING & CHARGING SYSTEMS Generators & Regulators - 163 Chassis

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Fig. 1: Drive Belt Routing
Courtesy of MERCEDES-BENZ OF NORTH AMERICA.

TROUBLE SHOOTING

PRELIMINARY INSPECTION

Verify customer complaint by operating system. Visually inspect for obvious signs of mechanical and electrical
damage. Check generator belt tension and condition. Ensure that battery voltage is within specifications. Inspect
for blown fuses and damaged relays.

Verify ground connection integrity between engine, body, battery and generator. Check for damaged wiring
harnesses and/or switches. Check for a broken or partially broken wire inside insulation, which could cause
system malfunction but prove good in a continuity/voltage check with system disconnected. Ensure any
aftermarket electronic equipment is properly installed. If fault is found, repair as necessary. If no fault is found,
check for conditions that might cause an intermittent situation.

SERVICE PRECAUTIONS

BATTERY DISCONNECT/CONNECT

Disconnect Procedures

1. On vehicles not equipped with TELE AID, go to step 5 . Vehicles equipped with TELE AID, switch

TELE AID into service mode by turning ignition ON.

2. Turn ON telephone and enter code "*#4610#" on handset.

3. Confirm that "No Telematics Service" appears on handset with okay.

4. Turn OFF handset.

5. Turn OFF ignition.

6. Open hood and open snap fasteners (1) on dust filter housing. See Fig. 2 .

7. Remove dust filter housing (2) exposing battery.

8. If not using quiescent current retention unit, go to step 14 . If using quiescent current retention unit, go to

next step.

9. Connect quiescent current retention unit by switching on quiescent current retention unit (7) and then first

connecting positive terminal (8) and negative terminal (9) of retention unit to positive cable and battery
ground (W10). See Fig. 3 .

10. On vehicles equipped with TELE AID, remove luggage compartment cargo anchoring lugs and remove

floor paneling.

11. Remove screws (1). See Fig. 4 .

12. Dismantle cover from TELE AID control module (A35/8).

13. Disconnect connection coupling for back up battery and remove back up battery.

14. Disconnect negative battery cable (1) and insulate terminal. See Fig. 5 .

NOTE:

Numbers and letters in text refer to numbers and letters in figures.

2001 Mercedes-Benz ML320

2001-04 STARTING & CHARGING SYSTEMS Generators & Regulators - 163 Chassis

me

Fig. 2: Removing Dust Filter Housing
Courtesy of MERCEDES-BENZ OF NORTH AMERICA.

2001 Mercedes-Benz ML320

2001-04 STARTING & CHARGING SYSTEMS Generators & Regulators - 163 Chassis

me