2003 Mercedes-Benz C240 Q&A

2003 Mercedes-Benz C240 Question: 2003 mercedes c240 once i start my car the engine fan goes on it markes collant

That the coolant is low what can be the problem i dont like that the fan is on every day that i turn on my car and its loud and its like aselerated pls let me know what i can do to fix the problem im a mechanic but never worked on this car so let me know -
Answer 1
have cooling system pressure tested to determine leak -
Comment 1
Where can i go to get that done because it doesnt leak any water or anything -
Comment 2
any german car rep place should be able to handle that for u -
Comment 3
But do u have any idea what it can be so i can try out and see if it stops -