thtguy

So the pass through that goes through the faux firewall it is a plastic fitting.

I need to part number if anyone can look it up for me I would be very greatful.

same type of part failed on my W202 C280 bui I just replaced it with a brass fitting

can't do that with this one as one side has a o-ring/circlip and the other side has 2 nipple style fittings.

thtguy

Everywhere I look I can find the hoses that connect to it and it is just listed as "connector"

thtguy

here you go some more big pictures with the part off the car. I love MB's use of Glass reinforced nylon for heater components. gets brittle with age.

thtguy

BTW no discernible part numbers all the numbers just tell you what the material is.

thtguy

and since I didn't get a picture of it's location. it is in the engine compartment partition just behind the driverside cylinder head.

thtguy

the part needed was (3) in the diagram, it comes with the hose attached.