hi my mercedes w204 with m272 engine c350 have coolant leak .... i check all hose of car and radiator all have nt any lekage bot when engine hot coolant leak from under car ..... leak position near the passenger side engine mont

 

Can you take it somewhere to have the system pressurized and then lifted to look for leaks?

 

Hi,
What colour is the fluid which leaks out and how much have you lost(leaked).

 

i trust its coolant because after leak poup up erorr top up coolant ...... i go to to a work shop for test it and they tell to me lekage source from freezing plugs

 

Sounds like you are up for a big job and expensive due freeze plugs are not usually easy to access.

 

There's not enough to tell the colour?

 

Ok, so what coolant mixture was excactly used in your car, not the type you think was in it, get it analised.