Trailer Hitch Retrofitting (7H)

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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.


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

  • Update the Central Electronics Control Module (J519 / #09) Coding
    • Add 0000002 to the existing Coding (e.g. 0000357 + 0000002 = 0000359).
    • Detailed Information will be shown once you access the Function using VCDS.
  • Update the Parking Aid (J446 / #76) 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 shown 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.

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