Plan For Installation - Mercedes-Benz Automatic Climate Control System II Installation Manual And General Information

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Plan for Installation

**Ensure the car is off and cold before working! Also, disconnect the battery.**
-Make note of any vacuum issues before installing the update kit.
1) Remove the glove box to gain access to the amplifier-connector.
2) Following the diagram, install three jumper wires across ports on the amplifier-
connector.
3) Disconnect the vacuum block and wiring harnesses from the servo under the hood.
4) Unscrew the servo from the mounts, and then loosen the cooling hoses from the
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) Connect the old servo wiring harness to the new electronic central control unit.
12) Install cable ties to hold the central control unit to the old bracket/ firewall/
appropriate location.
13) Tidy up and reinstall the battery. Then, crank the car and test for functionality.
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