Not sure I pulled out the whole stock stereo from my 2016 SL. It's al sitting in a box. Even the wire harness.
I couldn't stand the stock stuff, so lame. Now my SL rocks with 10" sub, 500watt to that and 4 6.5" coax with 75watt to each speaker and a Kenwood 10.1 headunit!
Chunk of change but worth it to me.