Mercedes-Benz ML320. Manual — part 650

Fig. 5: Locating A/C Refrigerant System Components
Courtesy of MERCEDES-BENZ OF NORTH AMERICA.

2001 Mercedes-Benz ML320

2000-01 MANUAL A/C-HEATER SYSTEMS ML 320, ML 430 & ML 55

me

Fig. 6: Removing Cooling Fans & Condenser
Courtesy of MERCEDES-BENZ OF NORTH AMERICA.

COOLING FANS

Removal & Installation

Remove headlight units. Remove upper frame crossmember, release hood release control cable and remove
crossmember. See Fig. 6 . Remove 2 cooling fans frame bolts on radiator. Disconnect cooling fan connector.
Release outside temperature sensor wiring harness. Pull up on cooling fan and remove. To install, reverse
removal procedure. Ensure cooling fan bottom guides are properly seated in lower mounts.

EVAPORATOR

Removal & Installation

Remove A/C housing unit. See A/C HOUSING UNIT . Remove expansion valve. See Fig. 5 . Discard "O"
rings. Disassemble A/C housing unit. Remove evaporator. Remove evaporator temperature sensor. To install,
reverse removal procedure. Use NEW "O" rings lubricated with refrigerant oil. If installing a new or repair
evaporator, add 1.35 ounces of NEW refrigerant oil to evaporator.

EXPANSION VALVE

Removal & Installation

1. Discharge A/C system, using approved refrigerant recovery/recycling equipment. Without disconnecting

coolant hoses, remove coolant expansion reservoir and set aside. Remove refrigerant line bracket and
loosen clamps. See

Fig. 5

. Pull refrigerant lines out of expansion valve.

2. Remove expansion valve self-locking nut and discard. Remove expansion valve. Discard "O" rings. To

install, reverse removal procedure. Use NEW "O" rings lubricated with refrigerant oil. Tighten NEW self-
locking nut to specification. See TORQUE SPECIFICATIONS .

INSTRUMENT PANEL & INSTRUMENT PANEL CARRIER

Removal & Installation

1. Secure vehicle against rolling. Set transmission selector to "D" position. Obtain radio security code.

Disconnect negative battery cable. Remove driver-side air bag.

2. Place match marks on steering wheel and steering shaft. Remove steering wheel, upper steering column

covers and combination switch. Remove instrument cluster cover frame. Remove one instrument panel
lower section bolt.

3. Remove screws in footwell from left side of instrument panel bottom section. Remove instrument panel

center section. Remove 4 A/C control panel screws and remove control panel. See Fig. 1 . Release pull
cables and disconnect connectors.

4. Remove screws from center section. Remove glove box. Remove screws in footwell from right side of

instrument panel bottom section. Remove entry courtesy lights. Remove end covers and screws.

5. Release 4 "A" clips between instrument panel bottom section and upper section. See Fig. 7 . Release

parking brake release cable from handle. With assistance, remove instrument panel bottom section.

2001 Mercedes-Benz ML320

2000-01 MANUAL A/C-HEATER SYSTEMS ML 320, ML 430 & ML 55

me

6. Remove A-pillar panel trim. Remove instrument cluster. Remove defroster vent cover. Remove air vents

and side air nozzles. With assistance, remove upper instrument panel.

7. Remove passenger-side air bag. Remove right side lower instrument panel cover. Remove instrument

panel carrier screws from A/C housing unit. Remove left side lower instrument panel cover.

8. Remove insulating mat between steering column and instrument panel carrier. Remove steering column

bolts and nuts from instrument panel carrier. See Fig. 8 . Remove instrument panel carrier center tunnel
bolts. Disconnect steering column connectors.

9. Remove wiring harness from instrument panel carrier. Remove wiper washer system. Remove instrument

panel carrier nuts from engine compartment side of firewall.

10. Remove A-pillar bolt covers and remove instrument panel carrier A-pillar bolts. With assistance, remove

instrument panel carrier through passenger door. To install, reverse removal procedure.

11. Ensure instrument panel bottom section guide tongues "B" are seated into instrument panel upper section

mounts. See Fig. 8 . Tighten nuts and bolts to specification. See TORQUE SPECIFICATIONS .
Recode radio. See RECODING RADIO under PROGRAMMING.

Fig. 7: Removing Instrument Panel Bottom Section
Courtesy of MERCEDES-BENZ OF NORTH AMERICA.

2001 Mercedes-Benz ML320

2000-01 MANUAL A/C-HEATER SYSTEMS ML 320, ML 430 & ML 55

me

Fig. 8: Removing Instrument Panel Upper Section & Instrument Panel Carrier
Courtesy of MERCEDES-BENZ OF NORTH AMERICA.

INTAKE AIR DUST FILTER

Removal & Installation

Remove passenger-side instrument panel lower trim panel. Release retaining clip and remove dust filter cover.
Pull dust filter down and out. See Fig. 9 . To install, reverse removal procedure.

2001 Mercedes-Benz ML320

2000-01 MANUAL A/C-HEATER SYSTEMS ML 320, ML 430 & ML 55

me