Help identify this part - 1993 W124 - PeachParts Mercedes-Benz Forum

smharr4 · #1 01-28-2007, 08:11 PM

This morning I discovered my driveway covered in engine coolant, a crack in the plastic portion of one of my coolant lines, and the fuse box area of the engine bay covered in coolant and I can't see a part number on the component that needs replacing.

The part in question (see photo) is the Y-shaped part that connects the heater hose (that attaches to the back of the engine block) to the washer bottle heater (metal line that runs between the two firewalls, and then into the battery compartment) and the heater core (metal line that disappears inside the dashboard from the engine bay).

My questions are:

1) What is the part number for this Y-shaped tube?
2) Is there a procedure for removing the other end of the tube from the washer heater line? It's well buried amongst a lot of other hoses and cables, and will be very fiddly to get to.

softconsult · #2 01-28-2007, 09:31 PM

Since you have the picture, why not just call the dealer and if they are stuck fax it to them.

Steve

G-Benz · #3 01-29-2007, 02:10 PM

Had the same part break on mine years ago with the same catastrophic results...actually it failed on the way home!

I got the part for about $45 at ************************ I need to go home and get the catalog out to view the item number...

...DIY install but PITA due to the tight confines of the aformentioned hoses and firewall clearance. The job is best left to Keebler elves...

smharr4 · #4 01-31-2007, 08:42 PM

I finally managed to extract the faulty part from the car and tested it. There is indeed a tiny fracture in the top of this component, and when I filled it with cold water it did start to slowly seep through the crack. When filled with hot water+coolant under pressure with the engine running, it must have looked like Niagra Falls.

In the photo above, the left side of the hose connects with a heater hose that goes to the back of the engine block (driver's side). The right side connects to the heater core, while the long thin hose snakes down underneath the blower motor housing and connects with a metal line that runs underneath the battery tray and eventually ends up becoming part of the heated screenwash system.

The sharp eyed amongst you will notice some numbers in white ink on the bottom of this part, there's a part number on there too, 124-830-54-15, and kudos to G-Benz for remembering the price - it's about $47 ($65+tax at the dealership)

Now, if only I could figure out how to get the new one back on - it was hard enough getting the old one off

Any ideas, anyone?

G-Benz · #5 02-01-2007, 09:04 AM

It's been years since I did the job. No short cut way to do it. You are in very tight confines as you already know, and long, skinny fingers are an advantage here. The task is all about getting the new part to press-fit onto the existing hose, so you try to use two fingers on one hand to leverage the hose and as many fingers as you can on the other hand to apply the necessary pressure to insert the new coupler!

I don't remember having to disconnect anything other than the affected part, but I might have damaged a bit of the firewall material in an effort to gain more working room.

I have short, chunky, (and bruised) fingers...this was not a fun project!