Starting with Android 4.2, a bug was introduced in the android OS that prevents a car dock app from overriding the home button while the phone is in car dock mode. This is a defect in the Android operating system and can only be properly resolved by Google.
However, we have developed a patch that fixes this issue.
It is available here: Car Mode Patch
The one drawback to this patch is that pressing the home button will no longer center the normal home screen on your device. I don’t anticipate having a fix for this. It is simply a drawback to having a patch instead of a permanent fix from Google.
1) Install Car Mode Patch from the Play Market: Car Mode Patch
2) Press the Home Button
3) Select the Car Mode Patch Home option
4) Tap Always
If you do not like the behavior of your phone with the patch installed, just uninstall the Car Mode Patch app.