NHTSA wants Chrysler to recall 2.7 million Jeeps, but the company says the agency’s conclusion is based on incomplete analysis. Porsche pulls the wraps off a special 50th Anniversary Edition 911. Garmin is starting to focus on getting its systems integrated into vehicles, as some devices become less popular. All that and more, plus John McElroy explains why he thinks the all-new 2014 Acura MDX is the best Acura he has driven in 20 years.