I recall the sales rep saying when I purchased my CLA45 a few years ago that I need to let the turbo's cool down after long drives or after pushing the car too hard. They noted the same at Land Rover when I picked up the discovery. I have always been adamant about doing so but I must have slipped up somewhere along the way.
My dealership was great though, I was leaving for a camping trip to Algonquin park (3.5 hours away) for 4 days and they had me take the loaner and enjoy my time worry free. The only down side was not having my roof rack on the loaner for racking some paddleboards. ha