Help Guys

A small hose ( 1/8 ") that is hardened and yellowed broke. As shown in the photo in blue- it runs it connects with an air filter housing hose and runs underneath the air filter housing to the object shown in the next photo in the blue box. By the way, this is a 1992 300E.

Does anyone know what this hose is and what it does. Does Fast Lane sell the part. So far I do not notice any difference with the engine.

Also what is the object marked in the second photo with a blue line.



I appreciate the help. With the assistance on this forum I drained and flushed the radiator (and block). Long overdue. Next up during the holidays. Bilstein stuts/shocks and subframe bushings. I haven't decided on the differential bushings.