I have a 2016 C450 and today as I was driving out of nowhere something popped up on the dash saying check coolant level. I drove straight home and filled it up and by the end of the day the same message came up on the dash. I did a pressure test from the coolant reservoir and was able to see where the coolant was leaking out from. I want to save some money grab the part and install it myself but I have no clue what exact part it is can someone help? Thanks in advance

 

Looks like main radiator hose line coming from the block/WP. should have all of the hsoe kits here. I would do all of them AND the tstat housing.
https://www.fcpeuro.com/Mercedes~Ben...atic&year=2016