It seems strange that this isn't standard in such a nice car, but there doesn't seem to be any adaptive or relative volume on the Model S. The volume levels for the Audio system and GPS voice seems fixed to the "levels" that you can set. I want the following features that seem missing 1. Adaptive volume level, subtly increase the volume and modify the EQ slightly to alter for speed changes and preferably internal noise levels (road noise, wind noise, etc), adapt both up and down Ex:freeway to quiet city roads or vice versa 2. Have the GPS voice volume relative to the Audio system volume level. If I set the Audio system at 4 and the GPS at 3, increasing the audio to 5 should also increase the Nav volume relatively without me having to keep changing it. Any indication that this has been brought up before and Tesla are working on this or plan on rolling something out. I would think the second one is a relatively easy fix. The first might require a bit more than just a quick fix.