8/14/2019 219 HO HVAC (TWK) 8-30-02

1/27

1

211 Climate Control

219 PP HVAC (TWK) 8-30-02

8/14/2019 219 HO HVAC (TWK) 8-30-02

2/27

2

These technical training materials are current as of the date noted on the materials, and may be revised or updated without notice.

Always check for revised or updated information.

To help avoid personal injury to you or others, and to avoid damage to the vehicle on which you are working, you must always refer

to the latest Mercedes-Benz Technical Publication and follow all pertinent instructions when testing, diagnosing or making repair.Illustrations and descriptions in this training reference are based on preliminary information and may not correspond to the final US

version vehicles. Refer to the official introduction manual and WIS when available.

Copyright Mercedes-Benz USA, LLC, 2002

Reproduction by any means or by any information storage and retrieval system or translation in whole or part is not permitted

without written authorization from Mercedes-Benz USA, LLC or it's successors.

Published by Mercedes-Benz USA, LLC

Printed in U. S.A.

8/14/2019 219 HO HVAC (TWK) 8-30-02

3/27

3

Objectives

Identify versions

Explain and demonstrate system operation

Show component location Explain solar panel function and component location

Show new tool for the AC line

8/14/2019 219 HO HVAC (TWK) 8-30-02

4/274

Versions Identify differences between: 2 Zone / Automatic Air Conditioning / AAC /

Thermatic (Standard E320)

4 Zone / Convenience Automatic Air

Conditioning / C-AAC / Thermotronic

(Standard E500, optional E320)

8/14/2019 219 HO HVAC (TWK) 8-30-02

5/275

Comparison

Feature 2 Zone system 4 Zone system

Temperature Zones Two Four Manual center vent Yes Yes

Humidity sensor Yes No

Multi function sensor No Yes

Sun sensor No Yes

Key dependant features No YesInlet filters Combo filter Dust filter

Charcoal filter No Yes

Actuator motors 6 12

B pillar vents No Yes

Solar roof Optional Optional

Diagnostics through N93 Yes Yes

8/14/2019 219 HO HVAC (TWK) 8-30-02

6/276

Control Module - 2 Zone

1. Temperature left side

2. Defrost

3. Increase Air Flow4. Air distribution rocker switch

5. Rear window heater

6. Temperature right side

7. Residual heat

8. Economy mode

9. Air distribution indicator

10. On/Off11. Air Flow Indicator

12. Reduce Air Flow

13. Recirculated Air Button

14. Automatic Air distribution and Blower Output

8/14/2019 219 HO HVAC (TWK) 8-30-02

7/277

Control Module - 4 Zone

1. Left air distribution

2. Defrost

3. Left temperature rocker switch4. Display

5. Right temperature display switch

6. Rear window heater

7. Right air distribution

8. Automatic air distribution and blowercapacity on right

9. Activated charcoal filter

10. Rear system control switchover

11. Increasing air flow12. On/Off

13. Reducing air flow

14. Residual Heat / compressor off

15. Recirculated air button

16. Automatic air distribution and blowercapacity on left

8/14/2019 219 HO HVAC (TWK) 8-30-02

8/278

Rear Control Unit

1. Left swivel air vents in rear2. Right swivel center vent in rear

3. Air quantity for left swivel air vent in rear

4. Air quantity for right swivel air vent in rear

5. Left temperature rocker switch

6. Right temperature rocker switch7. Display

8/14/2019 219 HO HVAC (TWK) 8-30-02

9/279

Filters

Dust filter(4 Zone system)

Combination filter

(2 Zone only)

8/14/2019 219 HO HVAC (TWK) 8-30-02

10/2710

Charcoal Filters

4 Zone only

8/14/2019 219 HO HVAC (TWK) 8-30-02

11/27

11

Compressor

Denso compressor

Clutchless

2 - 100% swept volume

Controlled by N22/... via

left front SAM (N10/1)

8/14/2019 219 HO HVAC (TWK) 8-30-02

12/27

12

New AC Connections

New style connection

211 589 00 63 00

(Low side suction line only)

Location: left inner fender

8/14/2019 219 HO HVAC (TWK) 8-30-02

13/27

13

Receiver Dryer

Located at bottom of condenser

No insert like a 203

Replace complete receiver drier

8/14/2019 219 HO HVAC (TWK) 8-30-02

14/27

14

Shut-Off Valve LocationM16/32

8/14/2019 219 HO HVAC (TWK) 8-30-02

15/27

15

Coolant Pump

Controlled via right front SAM (N10/1)

(M13)

8/14/2019 219 HO HVAC (TWK) 8-30-02

16/27

16

Solar Panel Control Unit

Note: N34/1 is located above the glove box, the dash pad

must be removed to access.

(N34/1)

8/14/2019 219 HO HVAC (TWK) 8-30-02

17/27

17

Solar Panels

24 Solar panels

8 on front

16 on rear

Provides interior ventilation

based on:

AC control unit inactive

Ambient temperature(sensor located in N34/1)

Solar energy

(G6)

8/14/2019 219 HO HVAC (TWK) 8-30-02

18/27

18

In-car Temperature Sensors

B10/4 with aspirator N70b1 with aspirator

8/14/2019 219 HO HVAC (TWK) 8-30-02

19/27

19

Humidity Sensor (B31/2)

Measures humidity, valueused to determine

compressor control

(2 Zone only)

8/14/2019 219 HO HVAC (TWK) 8-30-02

20/27

20

Multi Function Sensor (B31)

Measures: ambient temperature

humidity

pollution concentration

Inputs used for:

calculating climate control

actuating the compressor

recirculation based on pollution

(AC "ON", >7oC, activated filter

button actuated)

(4 Zone only)

8/14/2019 219 HO HVAC (TWK) 8-30-02

21/27

21

Networking 2 Zone

M2/5 Fresh/recirculation flap motor

M2/6 Left blend air flapM2/7 Right blend air flap

M2/15 Footwell flaps

M2/16 Defroster flapsM2/22 Center outlet flap

8/14/2019 219 HO HVAC (TWK) 8-30-02

22/27

22

Networking 4 Zone

M2/5 Fresh/recirculation flap motor

M2/6 Left blend air flap

M2/7 Right blend air flapM2/8 Left defroster flap

M2/9 Right defroster flap

M2/10 Left footwell flap

M2/11 Right footwell flapM2/12 Left center vent

M2/13 Right center vent

M16/30 Left rear blend flap

M16/31 Right rear blend flapA32m2 Charcoal filter motor

8/14/2019 219 HO HVAC (TWK) 8-30-02

23/27

23

2 Zone System

A - Fresh or recirculated air

B- Cooled air

C - Heated airD - Blend air

1 - Dust filter

2 - Evaporator

3 - Heat exchanger4 - Defroster outlet

5 - Center outlet

6 - Rear footwell

7 - Front footwell

8 - Front lateral outlet9 - Front center outlet

A32m1 - Blower motor

M2/5 - Fresh/recirculate actuator

M2/6 - Left blend flap actuatorM2/7 - Right blend flap actuator

M2/15 - Left and right footwell actuators

M2/16 - Left and right defroster actuators

M2/22 - Center outlet actuator

8/14/2019 219 HO HVAC (TWK) 8-30-02

24/27

24

4 Zone System

A - Fresh / recirculated air

B- Cooled air

C - Heated airD - Blend air

1 - Dust filter

2 - Charcoal filters

3 - Evaporator4 - Heat exchanger

5 - Defroster outlet

6 - Center outlet

7 - Rear footwell

8 - Left front footwell

9 - Right front footwell10 - Front lateral outlet

11 - Front center outlet

A32m1 - Blower motor

A32m2 - Charcoal filter motor

M2/5 - Fresh/recirculate actuatorM2/6 - Left blend flap actuator

M2/7 - Right blend flap actuator

M2/8 - Left defroster actuator

M2/9 - Right defroster actuator

M2/10 -Left footwell actuator

M2/11 - Right footwell actuator

M2/12 - Left center actuatorM2/13 - Right center actuator

M16/30 Left rear actuator

M16/31 - Right rear actuator

Sid V t

8/14/2019 219 HO HVAC (TWK) 8-30-02

25/27

25

Side Vents

(4 Zone)

8/14/2019 219 HO HVAC (TWK) 8-30-02

26/27

26

Key Dependent Features(4-Zone system only)

AC OFF mode activated (on/off)

activated charcoal filter activated (on/off)

automatic mode with automatic blower controland air distribution left/right activated (on/off)

during manual mode: selected blower speed

selected temperature target values (four values)

Key dependent feature can be toggled on/off via the IC.

8/14/2019 219 HO HVAC (TWK) 8-30-02

27/27

27

GF67.29-P-0003T Rear window defroster function

GF83.10-P-2002T Solar stationary ventilation

GF83.10-P-2004T Regulation of AAC

GF83.10-P-2182T Air ducting

GF83.10-P-2183T Solar generator control module

GF83.20-P-2109T Heater water circulation pump

GF83.20-P-2112T Heat exchanger shut-off motor

GF83.30-P-2118T Activated carbon filter GF83.30-P-2125T Air humidity sensor

GF83.40-P-0001-4T Notes on AC bus

GF83.40-P-0001T AAC function description

GF83.40-P-0004-02T Notes on C-AAC bus

GF83.40-P-0996T C-AAC functional description

GF83.40-P-0999T Table of contents AAC

GF83.40-P-2180T Operating module AACGF83.40-P-9990T AAC component summary

GF83.55-P-2100T Refrigerant compressor

GF83.57-P-2000T Temperature control function

GF83.57-P-2000TT Temperature control function

GF83.57-P-2107T In-car temperature sensor

GF91.29-P-3004T Code-related storage block selectionGF54.21-P-4109T Left SAM

GF54.21-P-4111T Passenger SAM

GF54.21-P-4130T Rear SAM

GF72.29-P-4115T Left front door DCM

GF72.29-P-4116T Right front door DCM

GF72.29-P-4117T Rear door DCM

GF80.57-P-4120T EISGF82.20-P-4110T Overhead control panel

GF54.21-P-4116T Lower control anel

Appendix