Is a 2013 Mercedes-Benz C300 more reliable than a 2017 Volkswagen Jetta Wolfsburg?
If you hesitate between these two models, know this. Not only will the Jetta cause you less trouble, but you’ll have a car in your hands that is still covered by a powertrain and corrosion warranty. It is true that the turbo engine of the Jetta had small problems in the chapter of its turbocharger, problem which is known is honored by Volkswagen if still under warranty. Otherwise, repairing the turbocharger dump valve may cost as little as a few hundred dollars if you go to an independent, somewhat resourceful workshop.
Much less expensive to maintain, insure and “fuel” than the Mercedes-Benz, so the Jetta is clearly a better choice in my opinion. It does not have the fiery Mercedes-Benz, or even the advantage of all-wheel drive, but has more up-to-date equipment that includes Apple CarPlay / Android Auto.
Remember this: a used Mercedes-Benz is always a roll of the dice. A more refined car, sure, but one that could turn into a financial nightmare, especially if the maintenance was not done properly. I recommend a mechanical inspection in both cases, if only to make sure that there are no unpleasant surprises (accident, hidden defects, neglect of maintenance).