I threw a CEL, and the car started running very roughly after sitting outside in wet weather. I opened up the hood, and found a giant tear in the hose that goes from the front grille opening towards the intake. Can anyone provide me with the part number and/or a rapid resource? I don't want to duct tape it if I can avoid doing so! Thanks in advance.

It's a C230Kompressor sedan.

That's most likely NOT the cause of your CEL, by the way. Get the code scanned and go from there (if you haven't already).
But the PN is 2710900382. $50

Spot on; water got into two cylinders somehow, it needed four new plugs and a couple coils. The hose arrives today, after the repair the CEL is gone and it's running great. I didn't ask the tech to write down the codes so I'm not exactly sure what they indicated.