OEM or AM HID's & cant get dyno mode to work
Posted from Mbworld.org App for Android

1- Put the key in the ignition position 1
2- Within 3 second after the ignition is turned on to position 1, push the "reset bottom 3 times then A display Voltages manual should appear on your cluster.
3- Use the arrow up/down on your steering wheel to change the screen until you see "Dynomometer testing" manual
4- Use the "-/+" on your steering wheel to turn the ESP ON/OFF for Dynomometer testing.


maybe this thread helps
https://mbworld.org/forums/clk55-amg...track-day.html
as far as the headlights go, I have limited knowledge but I would say that if you have the OEM headlights, than I would just replace it with another OEM



