The biggest catch of Apples CarPlay (aside from platform support) is its limitation to newer vehicles; at last check, most people wont buy a new car just to get better smartphone integration. Mercifully, Mercedes-Benz tells 9to5 Mac that its planning to deliver an after market solution for older cars by the end of 2014. The automaker isnt providing many details, although theres a good chance that its solution involves more than a simple software upgrade.