Too bad the MirrorLink consortium dropped the ball so epically. MirrorLink arguably does the same thing as Carplay/Android Auto and has been deployed to millions of vehicles, but nobody uses MirrorLink 1.1, why? Because to get your app certified takes tens of thousands of dollars, months, and tons of paperwork.
Carplay/Android Auto literally exist because the MirrorLink group created so many rules, regulations, and nonsense in the name of safety that MirrorLink 1.1 has like twenty apps total after two years(!). So if your vehicle has MirrorLink on the feature list, just laugh and forget it exists, you won't be using it.
PS - MirrorLink 1.0 allowed two way screen sharing, which was legitimately useful. MirrorLink 1.1 is a very different beast, most newer cars and phones only have MirrorLink 1.1 (no 1.0 at all). 1.1 defines things like how big buttons have to be, what kind of animations can play, how many button presses to reach each task, etc. Then everything has to be certified by an independent auditor.
PPS - Most depressing part is: MirrorLink could certify Carplay/Android Auto themselves, and instantly add both to millions of existing vehicles on the road. But they're never going to simply because they're effectively in competition with both.