Mercedes-Benz ML320. Service manual - part 130

 

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Mercedes-Benz ML320. Service manual - part 130

 

 

AR83.25-P-1405GH

Remove/install cover at air intake

3.3.97

MODEL 

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

P83.25-2012-06

1

Windshield wiper arms

2

Rubber seal

3

Cover

4

Nuts

5

Metal clips

6

Water deflector panel

  

Remove/install

 Danger!

Injury hazard by trapping or crushing, in 
extreme cases with loss of limbs when 
reaching into windshield wiper mechanism

Always remove ignition key when working on 
windshield wiper mechanism.

AS82.30-Z-0001-01A

1

Remove wiper arms (1)

AR82.30-P-6100GH

2

Detach rubber seal (2) from firewall

3

Remove metal clips (5)

4

Unscrew nuts (4) at firewall

 Remove foam insert.

5

Seal off washer fluid hose at check valve

6

Remove cover (3) together with water 
deflector panel (6)

 If damaged, detach water deflector panel 

(6) from cover (3).

 Installation: Lubricate upper edge of 

cover and windshield at bottom with soapy 
water.

7

Install in the reverse order

Copyright DaimlerChrysler AG  09.05.2006 CD-Ausgabe G/10/04 . This WIS print-out will not be recorded by Modification services.

Page 1

1998-2005 ENGINE

Air Intake, Turbo Charging - 163 Chassis 

BASIC KNOWLEDGE 

AIR INTAKE, FUNCTION - GF09.00-P-3000A 

ENGINE 112 (except 112.960 /961) without supercharger  

Fig. 1: Identifying Air Intake Components - Without Supercharger 

INTAKE MANIFOLD, LOCATION - GF09.20-P-3102-01A 

Shown on ENGINE 113  

  Purpose

Reducing intake noises

 

  Design/function

A Helmholtz resonator (branching filter) with a volume of about 0.6 liters, is installed 
to reduce the intake noises. This is active in the engine speed range from approx. 3500 
- 4500 rpm. As a side effect the air flow in this engine speed range is improved at the 
hot film mass air flow sensor and the measurement of the air mass is thus more 
accurate.

 

 

2001 Mercedes-Benz ML320 

1998-2005 ENGINE Air Intake, Turbo Charging - 163 Chassis

  

 

2001 Mercedes-Benz ML320 

1998-2005 ENGINE Air Intake, Turbo Charging - 163 Chassis

  

me 

 

me 

 

Fig. 2: Identifying Variable Intake Manifold - Shown On Engine 113 

INTAKE MANIFOLD, FUNCTION - GF09.20-P-3102-02A 

Engine 112, 113  

Section through variable intake manifold in cylinder plane  

Fig. 3: Identifying Intake Manifold Function - Section Through Variable Intake Manifold In Cylinder 
Plane
 

When the engine is started and at low engine speeds the variable flaps are open. The intake air flows along the 
shortest path and thus reaches the cylinder with low friction losses from the distributor volume. 

At an engine load of more than 50% from approx. 1750 rpm up to approx. 3900 rpm the variable flaps are 

 

2001 Mercedes-Benz ML320 

1998-2005 ENGINE Air Intake, Turbo Charging - 163 Chassis

  

me 

 

closed. The intake air must flow through the whole intake pipe. Its length is selected in such a way that the 
pressure waves, produced by the inducting pistons, arrive at the right moment at the open intake valves for the 
next induction stroke. The result is improved cylinder charge and thus an increase in torque. 

At higher engine speeds (e.g. from 3900 rpm) the actuation to the variable intake manifold switchover valve is 
interrupted - the variable flaps open as a result of the spring force. Through the shortened route the pressure 
waves arrive in time even at higher rotational speeds before the closing of the intake valves to the combustion 
chamber. 

INTAKE MANIFOLD, DESIGN - GF09.20-P-3102-03A 

Shown on ENGINE 112  

Fig. 4: Identifying Intake Manifold Components - Shown On Engine 112 

The intake manifold is assembled out of several magnesium pressure castings. When fitted together, they 
produce the individual intake manifolds and the air collecting volume. The parts are sealed off to each other by 
plastic. The intake manifold cannot be disassembled. 

The individual intake manifolds each approx. 800 mm long, are arranged in a spiral shape around the air 
collecting volume. A single intake manifold is assigned to each cylinder. 

Each single intake manifold has a further opening to the air collecting volume in the middle. These can be 
opened or closed by means of variable flaps which pivot through approx. 60°. 

The variable flaps are attached to steel shafts. One shaft is installed for each bank of cylinders. The 

 

2001 Mercedes-Benz ML320 

1998-2005 ENGINE Air Intake, Turbo Charging - 163 Chassis

  

me 

 

 

 

 

 

 

 

 

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