View of 107 ACC Modules

[ctaylor738]

I am trying to get the ACC on my 560SL to do something besides blow hot air at the windshield. So I working with the glove box out testing the vacuum actuators, and I thought I would post this picture of the key components of the ACC system., since they don't exactly stand up and introduce themselves.

This is looking in through the glove box.

1 - vacuum distribution module. Receives commands from the push-button unit and sends vacuum to appropriate actuators to open and close flaps. In the 380's this is 4 electro/vacuum switches mounted more to the right.

To get to this unit, you need to remove the stereo's amplifier CORRECTION - it's actually the alarm module (see below), which is normally mounted right in front of it.

2. - blower module. Takes input from the blower buttons and temp wheel and sensors and figures out the correct fan speed (black)

3. - temperature control module. Reads the dash and heater box sensors and temp wheel setting, and sends ground (close) to the monovalve to regulate hot water flow to the heater core (silver). The blower module mounts directly in front of it, and must be moved for access, as it has in the picture.