UPDATE:
- New software release February 2024: dashcam can be set to automatically record when ignition 8s started! That means no more going into dashcam app to start it.
Follow up video here:    • Mercedes MBUX dashcam - now records a...  

Got the optional Dashcam from Mercedes.
Pro's:
-Works with (I believe) any size storage (format: exFAT).
-Mercedes warranty covered
-Clean design
-720p is clear enough
Con's:
-Only front cam not rear
-$200 option is actually a lot more, because you have to option other items to get the dashcam option
-Doesn't auto start recording