Well turbo finally died. 158890 miles. heard whistling for a month or so but it kept going. Made appoint at dealer where i bought car new 2014. it went to limp mode 2 times driving 130 miles to dealer. The diesel tech there tested for possible reasons for P0299 code, all switching of controls were working, and said turbo is not working. I been running Liquimoly top tech 4200 5/30 motor oil since first oil change from new. Guess i am lucky from reading all other turbo failure's at half this mileage. So new manifold/turbo unit installed, cost $2800 dealer had it in stock. Pricey yes, but i am happy.