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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 referto 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 USversion 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 permittedwithout written authorization from Mercedes-Benz USA, LLC or it's successors.Published by Mercedes-Benz USA, LLCPrinted 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 AirConditioning / C-AAC / Thermotronic(Standard E500, optional E320)

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Comparison

Feature 2 Zone system 4 Zone systemTemperature Zones Two FourManual center vent Yes YesHumidity sensor Yes NoMulti function sensor No YesSun sensor No YesKey dependant features No YesInlet filters Combo filter Dust filterCharcoal filter No YesActuator motors 6 12B pillar vents No YesSolar roof Optional OptionalDiagnostics through N93 Yes Yes

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Control Module - 2 Zone

1. Temperature left side2. Defrost 3. Increase Air Flow4. Air distribution rocker switch5. Rear window heater6. Temperature right side7. Residual heat

8. Economy mode9. Air distribution indicator10. On/Off11. Air Flow Indicator12. Reduce Air Flow13. Recirculated Air Button14. Automatic Air distribution and Blower Output

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Control Module - 4 Zone

1. Left air distribution2. Defrost3. Left temperature rocker switch4. Display5. Right temperature display switch6. Rear window heater7. Right air distribution8. Automatic air distribution and blower capacity on right

9. Activated charcoal filter10. Rear system control switchover11. Increasing air flow12. On/Off13. Reducing air flow14. Residual Heat / compressor off15. Recirculated air button16. Automatic air distribution and blower capacity on left

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Rear Control Unit

1. Left swivel air vents in rear2. Right swivel center vent in rear3. Air quantity for left swivel air vent in rear4. Air quantity for right swivel air vent in rear5. Left temperature rocker switch6. 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 ConnectionsNew 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 padmust be removed to access.

(N34/1)

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Solar Panels

• 24 Solar panels

• 8 on front

• 16 on rear

Provides interior ventilationbased 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 determinecompressor 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 motorM2/6 Left blend air flapM2/7 Right blend air flap

M2/15 Footwell flapsM2/16 Defroster flapsM2/22 Center outlet flap

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Networking 4 Zone

M2/5 Fresh/recirculation flap motorM2/6 Left blend air flapM2/7 Right blend air flapM2/8 Left defroster flap

M2/9 Right defroster flap M2/10 Left footwell flapM2/11 Right footwell flapM2/12 Left center vent

M2/13 Right center ventM16/30 Left rear blend flap M16/31 Right rear blend flapA32m2 Charcoal filter motor

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2 Zone System

A - Fresh or recirculated airB- Cooled airC - Heated airD - Blend air

1 - Dust filter2 - Evaporator3 - Heat exchanger4 - Defroster outlet5 - Center outlet

6 - Rear footwell7 - Front footwell8 - Front lateral outlet9 - Front center outlet

A32m1 - Blower motorM2/5 - Fresh/recirculate actuatorM2/6 - Left blend flap actuatorM2/7 - Right blend flap actuator

M2/15 - Left and right footwell actuatorsM2/16 - Left and right defroster actuatorsM2/22 - Center outlet actuator

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4 Zone System

A - Fresh / recirculated airB- Cooled airC - Heated airD - Blend air

1 - Dust filter2 - Charcoal filters3 - Evaporator4 - Heat exchanger5 - Defroster outlet6 - Center outlet

7 - Rear footwell8 - Left front footwell9 - Right front footwell10 - Front lateral outlet11 - Front center outlet

A32m1 - Blower motorA32m2 - Charcoal filter motorM2/5 - Fresh/recirculate actuatorM2/6 - Left blend flap actuatorM2/7 - Right blend flap actuatorM2/8 - Left defroster actuatorM2/9 - Right defroster actuator

M2/10 -Left footwell actuatorM2/11 - Right footwell actuatorM2/12 - Left center actuatorM2/13 - Right center actuatorM16/30 Left rear actuatorM16/31 - Right rear actuator

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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 control and 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 functionGF83.10-P-2002T Solar stationary ventilationGF83.10-P-2004T Regulation of AACGF83.10-P-2182T Air ductingGF83.10-P-2183T Solar generator control moduleGF83.20-P-2109T Heater water circulation pumpGF83.20-P-2112T Heat exchanger shut-off motorGF83.30-P-2118T Activated carbon filterGF83.30-P-2125T Air humidity sensorGF83.40-P-0001-4T Notes on AC busGF83.40-P-0001T AAC function descriptionGF83.40-P-0004-02T Notes on C-AAC busGF83.40-P-0996T C-AAC functional descriptionGF83.40-P-0999T Table of contents – AACGF83.40-P-2180T Operating module – AACGF83.40-P-9990T AAC component summaryGF83.55-P-2100T Refrigerant compressorGF83.57-P-2000T Temperature control functionGF83.57-P-2000TT Temperature control functionGF83.57-P-2107T In-car temperature sensorGF91.29-P-3004T Code-related storage block selectionGF54.21-P-4109T Left SAMGF54.21-P-4111T Passenger SAMGF54.21-P-4130T Rear SAMGF72.29-P-4115T Left front door DCMGF72.29-P-4116T Right front door DCMGF72.29-P-4117T Rear door DCMGF80.57-P-4120T EISGF82.20-P-4110T Overhead control panelGF54.21-P-4116T Lower control panel

Appendix