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Chris, That car looks fantastic, what a difference the update makes. I located the headlight harness, coding I can handle, I have an SDS. Love the steering wheel.
Facelifted my 2013 to a 17 and up SL63. Head lights were a nightmare. Finally came up with a solution. After installing a cable converter kit from Germany for the new lights and nothing worked. My dealer had a 2020 on the lot. They were nice enough to take my lights and install them in their car and program them. Put them back in my 13 and they work.
Just wanted anyone struggling with this to know its possible.