Here's the background: On the way home from work tonight my low coolant light came on about 2 miles from home. I kept my eye on the gages and lights after that....temperature gage stayed constant at about 83 degrees. Just as I turned onto my block, the temperature started to climb, so I immediately killed the motor and coasted home, up into my driveway. The temperature never got into the red band, I killed it just as soon as I saw the rising trend. (Lucky!) Got the car into the garage and there is a steam leak near the rear of the motor, behind the air cleaner. Couldn't ID the source of the leak with all the steam flying, so I waited for it to cool, fearing the worst.

I have found the leak to be a split hose. It is at the rear of the motor, coming out on the driver's side (left), of the head, then takes a 90 degree skyward, then a 90 degree bend to the left, where there is a T junction with a much smaller hose, then another bend and through the wall that separates the fuse box compartment from the engine bay, connecting to a metal pipe that goes through the firewall on the driver's side - center.

I'm assuming that this is a heater hose, but looks specialized with that T junction in it to that smaller hose (what's that?). Oh, never mind, it connects to a metal pipe that routes to the heating coil inside the windshield washer fluid resevoir.

My car is a U.S. 1991 300E with a M103 motor, auto trans, climate control, blah blah. The problem I'm having is that I can't readily ID it on the Fastlane parts finder. On heater hoses it asks what chasis range my car belongs to:

-A 289309
-A-283309
-B 527022

??? Where do I find that? Also, none of the hoses pictured look like mine with the T junction in it.

TIA
Jeff

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