Trailer Hitch Retrofitting (3C)

These instructions may not cover mechanical/electronic details, they will only list the the diagnostic side (coding etc.). Additional details for the mechanical/electronic work needed are part of the retrofitting instructions provided by the parts supplier (i.e. trailer hitch retrofits) or can be found in the factory repair manuals and wiring diagrams.

Installation & Wiring

Information regarding the Installation can be found in the Repair Manuals, the Wiring Diagrams, the Parts Catalog and/or the Instructions included in the Retrofitting Kit.

Configuration

The following Activations are necessary to ensure that the newly fitted parts are properly recognized and are ready to use.

• Update the Installation List in the Gateway (J533 / #19).
  • Register the newly added 69 - Trailer Control Module.
• Update the Trailer Control Module (J345 / #69) Coding.
  • Not all Retrofitting Kits contain Diagnostic capable Trailer Control Modules, some Aftermarket Modules may even be pre-coded. This Step can be ignored for Modules which are not Diagnostic capable.
  • Due to different Control Modules and Equipment in the Car the actual Coding Table is not shown here but will automatically be used by the Long Coding Assistant once you access the Function using VCDS. If an Aftermarket Module is installed, check the Retrofitting Kit for further Instructions.
• Update the Brake Electronics (J104 / #03) Configuration.
  • The Trailer Stabilization only needs to be activated through MY 2007. For MY 2008+ you can ignore this Step.
  • Add 0016384 to the existing Coding (e.g. 0013629 + 0016384 = 0030013).
  • Additional Information may be shown once you access the Coding Function using VCDS.
• Update the Engine Control Module (J623 / #01) Coding.
  • Make sure that the Engine is NOT running, otherwise the new Coding will be rejected. Models equipped with Start/Stop System do have a Shutoff Switch/Button which will deactivate the Start/Stop Function.
  • Due to different Control Modules and Equipment in the Car the actual Coding Table is not shown here but will automatically be used by the Long Coding Assistant once you access the Function using VCDS.
    • If the Engine uses conventional short coding (i.e. 0000077) the Long Codding Assistant does Not apply. Modules using short coding typically do Not support or require trailer configuration coding.
• Update the Parking Aid (J446 / #76) OR Parking Aid 2 (J446 / #10) Configuration, if installed.
  • Depending the exact Model/Model Year either Coding or Adaptation can be used.
  • Due to different Control Modules and Equipment in the Car the actual Setting is not documented here but will automatically be shown once you access the Coding/Adaptation Function using VCDS. A Security Access may be necessary prior to Coding the Module.
• Update the Rear View Camera (J772 / #6C) Coding, if installed.
  • Due to different Control Modules and Equipment in the Car the actual Coding Table is not shown here but will automatically be used by the Long Coding Assistant once you access the Function using VCDS.
• Update the Lane Maintain Assist (J759 / #5C) Coding, if installed.
  • Due to different Control Modules and Equipment in the Car the actual Coding Table is not shown here but will automatically be used by the Long Coding Assistant once you access the Function using VCDS.

If you are having trouble finding/calculating the proper Coding using the Long Coding Assist please Contact us directly. Make sure to include a complete Diagnostic Protocol (Auto-Scan) from the Car and state which steps/work you have performed yet.