UPDATED---today we were informed of a class action...

UPDATED---today we were informed of a class action lawsuit related directly to our make/model of vehicle and the issues we were experiencing. In a nutshell we had been going to Pampered Auto Care for around 3-4 years. We brought the vehicle in for a repair and were quoted $1100. Once the vehicle was taken apart, the $1100 became a $2400 repair that resulted in disabling the vehicle. From there we were informed that it would require an additional $5000 (expensive MB part at factory cost plus labor) to repair the vehicle. The owner/mechanic informed us that the carbon build-up in that diesel was a known issue, and that basically we should have known. We are not mechanics. We had brought the vehicle to Pampered Auto Care trusting their expertise. As the owner/mechanic was aware that it was a known issue, had he explained the potential problems and related costs BEFORE doing any work this round, it would have given us the opportunity to make different decisions rather that feeling like we were being led down a financial rabbit hole. We ended up selling the vehicle at a loss.