Looking for some help.

I took my 2013 C250 (60k miles) in to get a leak coming from the rear main seal fixed and get the alternator replaced.

I get it back and notice more turbo noise than before dropping it off.. and am seeing a significant decrease in acceleration above 2.5k RPMs.

Any ideas of what could be causing this? thanks in advance.

 

Tech didn't connect one of the boost lines. All good now.