219 ho hvac (twk) 8-30-02
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211 Climate Control
219 PP HVAC (TWK) 8-30-02
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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.
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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
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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)
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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
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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
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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
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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
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Filters
Dust filter(4 Zone system)
Combination filter
(2 Zone only)
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Charcoal Filters
4 Zone only
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Compressor
Denso compressor
Clutchless
2 - 100% swept volume
Controlled by N22/... via
left front SAM (N10/1)
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New AC Connections
New style connection
211 589 00 63 00
(Low side suction line only)
Location: left inner fender
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Receiver Dryer
Located at bottom of condenser
No insert like a 203
Replace complete receiver drier
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Shut-Off Valve LocationM16/32
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Coolant Pump
Controlled via right front SAM (N10/1)
(M13)
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Solar Panel Control Unit
Note: N34/1 is located above the glove box, the dash pad
must be removed to access.
(N34/1)
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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)
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In-car Temperature Sensors
B10/4 with aspirator N70b1 with aspirator
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Humidity Sensor (B31/2)
Measures humidity, valueused to determine
compressor control
(2 Zone only)
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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)
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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
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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
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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
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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
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Side Vents
(4 Zone)
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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.
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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
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