Step #11: Connect The Wiring Harness - Mercedes-Benz Automatic Climate Control System II Installation Manual And General Information

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Step #11: Connect the Wiring Harness

1) Locate the two wiring connectors you removed from the servo.
2) Remove the four screws holding the top onto the new central control unit included in
the kit. Identify the 10 harness connector pins at the bottom of the board. From the
perspective of the 10 pins at the bottom of the board (solenoids at the "top"), the pin on
the far left is pin #1 and the pin on the far right 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) Once the two wiring connectors are fastened to the board, route the wires through the
cutout on the lid of the central control unit case before reinstalling the four screws. See
the photos below.
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