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Climatronic Control Module A/C Control Head






Climatronic Control Module A/C Control Head

Removing

- Check coding and adaptation of A/C control head Climatronic Control Module (J255) via the "Replace control module" function of Guided Fault Finding (in the event that A/C control head Climatronic Control Module (J255) is to be replaced).

- Switch off ignition.

• The removal of the Climatronic Control Module (J255) A/C control head is identical for both "Comfort" and "Basic" versions.

• The Climatronic Control Module (J255) A/C control head - A - is secured in the center console by 4 retaining clips - E -.





• As of the beginning of 2006, Climatronic Control Module (J255) are installed with gradual introduction of modified clips - A - on the top (clips on bottom remain the same, version - B -), at the same time instrument panel center sections with modified mounting bracket for the top clips version - C - are also introduced. For Climatronic Control Module (J255) units on which clip - B - is installed (force-fitted clip with an angle of approximately 120° installed, on the version that was installed up to beginning of 2006, panel colored pearl-gray metallic), this control and display unit can be removed without removing the center instrument panel vent.





• For Climatronic Control Module (J255) units on which clip - C - is installed (form-fitted clip with an angle of approximately 65° installed, on the version that was installed as of beginning of 2006, panel colored Nero), this control and display unit can only be removed with the center instrument panel vent removed. So that clips - C - can be disengaged, one slot - D - each in the instrument panel center section has been installed in the area of the upper mounting bracket for clips.





CAUTION!
• With the introduction of form-fitting clips - C - (with an angle of approximately 65°) on top of the A/C control head, modified instrument panel center sections have also been introduced (can be detected by a vertical slot - D - in area of top mounting bracket.) If an A/C control head with clips - C - should be installed in an instrument panel center section without this slot - D -, possibly it can only be removed after removing the instrument panel center section (form-fit connection can only be disengaged via this slot from the front).

• Climatronic Control Module (J255) units which were installed at the beginning of 2006 with a panel colored "pearl-gray metallic", force-fitted clips - B - are installed on the top, deviating from this however during the transition period, form-fitting clips - C - may also be installed at some components, only form-fitting clips - C - are installed with the introduction of A/C control head units with a panel colored "Nero".





Removing on a vehicle with a production date as of beginning of 2006

- Grasp under Climatronic Control Module (J255) - B - and carefully pull Climatronic Control Module (J255) out of center console (A/C control head with a panel colored "pearl-gray metallic"), if it cannot be disengaged from the instrument panel center section, remove center instrument panel vent.





- Remove center instrument panel vent (A/C control head with a panel colored "Nero")

- Using two small screwdrivers - A -, disengage the latches of both top clips - C - (above slots in instrument panel center section), then grasp under the Climatronic Control Module (J255) A/C control head - B - and carefully pull it out of center console

Removing on a vehicle with a production date up to beginning of 2006

- Grasp under Climatronic Control Module (J255) - A - and carefully pull it out of center console (A/C control head with a panel colored "pearl-gray metallic").





Continued procedure

- Disengage catches of connector - D - by pressing retaining tabs - F - and disconnect this connector.





- Wait 30 seconds (to protect electronics in the Climatronic Control Module (J255) A/C control head ).

- Disengage connector - E - and disconnect it.

- Disengage catches of connectors - A - to - C - by pressing retaining tabs - F - and disconnect them.

Installing

- Check the clips on top of Climatronic Control Module (J255), if there should be different clips - A - on the new A/C control head to be installed than those on the removed A/C control head (e.g. clips - B - instead of - C -), remove these clips using a small screwdriver - D - and replace them with the correct version.





• Only install the Climatronic Control Module (J255) A/C control head on which clips - C - are installed (form-fitting clips with an angle of approximately 65°), when slots - D - are present in instrument panel center section (without this slot, the A/C control head can only then be removed again with the instrument panel center section removed, the clips cannot be disengaged on a instrument panel center section without slot).





Install the Climatronic Control Module (J255) A/C control head (install in reverse order).

- Check the DTC memory for the Climatronic Control Module (J255) A/C control head and erase any faults displayed if necessary.

- Perform the basic setting, coding, adaptation and output diagnostic test mode on the A/C system.
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