Did they ever find the issue. Currently experiencing the same thing on my c300

 

I just came across this exact problem, I have no burst in the hoses, this usually happens when I go from 3 to 4 gear or , 3rd seems to be the issue the rpm strikes to 4k and acceleration drops completely and it doesn’t shift to 4th until I do it manually. I would like to think this is a water pump issue, I wanna take it to a shop but they are thieves and liars around my area any suggestions??? 75k miles

 

I have the same P0299 code, where are the turbo hoses exactly in a 2015 C300? Those pics are too close to find their locations.

 

I took my C back to the dealer with the P0299 code, they said the turbo charge is shot. Total cost to replace and new hoses along with changing a leaked gas lines, $14,000; luckily it is covered under my extended warranty at 55K miles 6.5 yo. Did anyone else experienced turbo charge failures?