I have a 2004 c230 and I had a squeaking noise when the engine first started. It was my water pump with uneven wear on the water pump pulley that was causing the sound. I will tell you it could be many different things, but this was my reason.
Loose belts
What you are probably hearing is one of the doors for the ductwork squeaking as it opens/closes due to applied vacuum coming from a freshly started engine.
Sounds like a fan belt. Have it checked. or an sai motor
Possibly, the ball joint is bad or a bad strut, but I would have the ball joint checked first.
not enough oil in the engine.
Find where the squeek is coming from first. ~HD-RC~
Because this puts the least strain on the engine.
Check the battery and the connections to the engine.
Bavarian Motor Works, It first started as a plane engine company.
It could be the fuel pump. Sometimes they make a high-pitched whine that might sound like a squeek.
It is in Darjaling started by Britishers as a disel engine by Cummins
Starte could need a shim.