Had the lights upgraded to LED (LasFit) and once the front turn signal bulbs were installed, the turn signals and hazard lights wouldn't work.
The mechanic figured out if you hold the hazard switch down, it doesn't engage/click or light up, but, the turn signals work. I need a new Hazard switch button, and if anyone has one handy/spare, etc., please let me know.
There are an Audi and a VW Hazard switch that come up in a search on MB and Star Parts and even FCP Euro using a search on 03 SLK320. Mostly, the part is no longer made, it seems.

I just imagine some Benz engineer saying, Ya, connecting the hazard lights and the turn signals so if one part fails, the whole other part fails, makes sense.
Thanks in advance.