Mercedes-Benz Automatic Climate Control System II Installation Manual And General Information Download | Manualshive

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Mercedes Automatic Climate Control System II:

Installation Manual and General Information

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Summary of Contents for Automatic Climate Control System II

Page 1: ...of 1 20 Mercedes Automatic Climate Control System II Installation Manual and General Information All rights reserved ...

Page 2: ... every climate control setting Make sure any of the issues present in your automobile are not vacuum leaks If your climate control system is not functioning properly as a result of vacuum leaks this will not solve your problem Before working under the hood ensure the car has had plenty of time to cool Make certain the vehicle is in park with the emergency brake on Also disconnect the negative batt...

Page 3: ...eter radiator hose 3 Quick connect cables for servo amplifier bypass 1 4 Way vacuum hose connector 1 1 8 Vacuum Plug 4 Plastic cable ties Helpful Necessary Tools Phillips screwdriver multiple sizes and lengths Flat head screwdriver pry tool Various pliers needle nose channel locks Socket Set Multimeter optional for testing Gauge to measure vacuum if the car has a vacuum leak All rights reserved ...

Page 4: ...re Although the original design sounds fantastic in theory the servo and amplifier are poorly designed parts purchased from Chrysler and simply cannot stand the test of time My modern update kit easily integrates into the existing system to maintain the original controls and provide OEM function The central control unit you are about to install takes the job of both the amplifier and the servo It ...

Page 5: ...e bottom four ports 5 Remove the servo from the car and set it aside 6 Install the copper tube between the return lines 7 Install the hot water vacuum valve between the auxiliary water pump and heater core 8 Cut and insert the source vacuum line 9 Connect the vacuum line to the hot water vacuum valve 10 Connect the vacuum hoses from the control unit to the vacuum block removed from the servo 11 Co...

Page 6: ...ticular labelled 14 or 19 depending on the chassis controls whether the blower motor can come on or not If your blower motor only functions on defrost you likely have a vacuum leak or faulty vacuum switch Some folks have installed an electronic toggle switch in place of vacuum switch 14 19 to manually control whether the blower motor can receive power See photos in appendix for details of switch o...

Page 7: ...he screws holding the glovebox latch in place Set these parts aside for reassembly 3 Gently pry around the edges of the glovebox light It will pop out and you can slip it back through its hole vertically so it is safely behind the glovebox liner and out of the way 4 Once every fastener is fully removed and set aside grip the edges of the glovebox liner and work it out of the car It too is old and ...

Page 8: ...ide 2 The amplifier is held in by two Phillips head screws They can be exceedingly time consuming to remove Thus many people prefer to simply remove the wiring connector and leave the amplifier in place which is fine 3 Slide the wiring connector off the amplifier Then install the three included jumper wires to connect pins 1 2 3 5 and 7 8 Make sure the jumper wires seat fully in connector ports Se...

Page 9: ...e two bolts holding the servo to the bracket 5 See the photo below to tag which side of the servo is for return and which is the source for the heater core Be ready to cork or stop the lines quickly after removing them from the servo Minimal coolant loss is very important to prevent too much air from entering the system Once you are prepared carefully slip the lines off the servo one at a time and...

Page 10: ... 5 8 coolant hose already on the auxiliary pump to the proper length and direction differs slightly depending on your chassis to allow the hot water vacuum valve and the hose adapter to fit between the two lines Please see the photos for an example from an R107 380sl 4 Once the 5 8 hose already on the auxiliary pump is the proper length and direction install and clamp the 5 8 to 3 4 coupler to the...

Page 11: ...opper Tube and the Valve Photos and Details You will likely loose coolant during this process which is not optimal but you will add coolant to the coolant tank at the end so it the system should bleed the limited air out All rights reserved ...

Page 12: ... unit Follow this black line to the passenger side of the car Then cut the line and tap into it The green line coming out of the new central control unit is preinstalled with a three way T made up of hoses to tap into any of these lines The two halves of the cut line will slip into the two hoses coming out of the green line 3 for R107 only The vacuum reservoir is located in the passenger front fen...

Page 13: ...t into port 8 Push connect the clear line from the new central control unit into port 5 Push connect the red line from the new central control unit into port 7 Push connect the provided 4 way vacuum line connector into ports 1 2 3 and 4 Push connect the provided 1 8 vacuum plug into port 6 3 On the bottom of the servo you disconnected a yellow or white and black vacuum line previously Using the pr...

Page 14: ...of 14 20 Steps 9 and 10 Vacuum Accessory Diagram All rights reserved ...

Page 15: ...t is pin 10 Be very careful to identify which is which pin you don t want to install the connectors backwards The connector pin groups are also labelled for color on each end of the board 3 See the diagram on page 16 to identify which of the two Mercedes wiring connectors goes on each of the two 5 pin groups Slide each of the respective wiring connectors onto their 5 pin attachments on the board 4...

Page 16: ...of 16 20 Step 11 Connecting the Wiring Harness Diagram Cable Connectors Board All rights reserved ...

Page 17: ...ol unit to the servo bracket 2 Using the plastic cable ties provided slip them through the holes in the central control unit case and the holes in the bracket where the servo once mounted 3 Fasten the cable ties and ensure the central control is tightly held to the bracket 4 If you prefer to fasten the central control unit in a different manner that is completely acceptable Please see the attached...

Page 18: ...ebox 4 Once all wires are neat and orderly and nothing is left exposed to short you may reconnect the battery cables Follow proper procedure positive first then negative 5 Start the car and perform the following test 1 Run the engine until the coolant warms to operating temperature 2 Press the defrost button DEF The blower should run at maximum temperature and the dash vents should blow hot 3 Make...

Page 19: ...e are no shorts You want to look for pulled connectors or torn wire casing The blow motor only comes on when I press DEF what should I do First make sure power is getting to the central control unit by checking the wiring harnesses with a multimeter Another way to visually observe power getting to the central control unit is if the hot water valve is pulsing then it is getting power Second you nee...

Page 20: ...nstall a toggle switch between the wiring harness bypass wire to manually control when the blower is allowed to receive power or not I m not getting any heat what should I do Make sure you ve given the engine plenty enough time to get warm Then check both inside the central control unit case remove the four screws on top and on top of the hot water valve to make sure the vacuum lines haven t slipp...

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