BJF08

I have a 2008 Cayenne and the Daytime Running Lights include all the lights (marker lights, tail lights, plate lights and headlights). I had the dealer disable the DRLs at startup however, as soon as i switch the light switch to marker lights, all the lights come on including headlights. Does anyone know how to have just the marker lights as DRLs and not the headlights? Similar to the new models of Cayennes.