Question about 2003 Mercedes-Benz S500

1 Answer

Engine compartment diagram

Loosing antifreeze from a black tube in the back of the engine going through the fire wall. It seems the seam of this coupler has split? On the engine side there is a single conection and on the other side there is two one same size as other and one smaller. Is this piece available aftermarket and what the part no might be. Thank you in advance

Posted by on


1 Answer

  • Level 2:

    An expert who has achieved level 2 by getting 100 points


    An expert that got 5 achievements.


    An expert who has answered 20 or more questions within one hour.


    An expert who has answered 20 questions.

  • Expert
  • 111 Answers

This is the heater core ,just replace it can be leaking inside your car

Posted on Mar 27, 2014


1 Suggested Answer

  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

A 6ya expert can help you resolve that issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
The service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
Good luck!

Posted on Jan 02, 2017


Add Your Answer

Uploading: 0%


Complete. Click "Add" to insert your video. Add



Related Questions:

1 Answer

I have a leak in the coolant line going from the front to back of my 1999 3.3L dodge Grand Caravan. The problem is a leak on two metal tubes going from the fire wall area down under the van where ther...

A call to the dealership should be able to get you the official name but I would desribe them as the rear heater core lines. These lines basically supply heated engine coolant for the rear heat. A dealership parts dept can pull up a diagram of the vehicle based on the VIN number and give you the exact name and part number.

Aug 13, 2011 | 1999 Dodge Grand Caravan

2 Answers

My truck wont blow out any hot air, just cold. i put a new radiator and thermostat in it. it is full of anti freeze

Try removing the Heater hoses from heater tubes(be careful not to break heater tubes off) then back flush heater core with garden hose(Don't use a lot of pressure). Jell from antifreeze builds up in the heater core and blocks the coolant flow. If it is easier, remove the heater hoses from the engine, that is safer. Back flush the heater from the hoses. To Back Flush (The hose coming from the water pump is the inlet)(Hose going to Manifold is outlet) Back flush outlet hose! To much water pressure may cause damage to heater core!!!! Do Not ues AIR!!!!

Sep 28, 2010 | 2001 Chevrolet S-10

1 Answer

Water leaking from under glove compartment in

Is it all the time, it could be the heater core. if it's only when you run your a/c it's a plugged drain tube. it's located under the hood, by where the a/c goes into the fire wall. it's a black, soft rubber tube

Jun 16, 2010 | 2006 Toyota Matrix

1 Answer

1994 plymouth voyager heating problems. Just

After the car warms up feel the heater hoses that go into the fire wall from the motor both should be warm if only one is warm and the other is cool the heat valve that opens the flow of antifreeze to the heater core is not functioning locate the valve (either under dash in passenger compartment or in the egine compartment) it has a vacuum line going to it and it should have vacuum when the heat is on if not replace the vacuum line or valve itself. Back flush heater core and also be sure the level of antifreeze is up to the top low antifreeze will cause no heat to occur.

Jan 05, 2010 | 1994 Plymouth Voyager

2 Answers

I bought a 2000 caravan a few months ago, every time it rains water pours in from under the glove compartment on the passenger's side. I can reach my hand up into a tunnel like opening under that area. I...

sounds like the drain tube has fallen off check the side of the foot well is there a tube there that you could attach to the fire wall if so attach it this should solve your problem

Oct 09, 2009 | 2000 Dodge Grand Caravan

1 Answer

I have a 1992 Dodge Dakota. When the A/C is

V6 engine? If so, there is a small plastic vacuum tube that runs from the blend door actuator under the dash to a connector in the engine compartment. The tube goes thru the fire wall about 5 inches above the throttle cable (right under the heater core tubes). The tube runs about 10 inches (behind the intake manifold) to a vacuum tube that tee's off the right side of the intake.

My tube was and NAPA did not have a tube that small but had one that fit over it for a quick splice.

Jun 14, 2009 | 1992 Dodge Dakota

2 Answers

Antifreeze keeps leaking out


Dec 30, 2008 | 1983 Chevrolet Cavalier

1 Answer

Found 2 pin orange/black connector on ~2" wire in rear driver's side engine compartment...

the orange and black wire is it on the fire wall on passenger side in engine compartment? if is the case it is used for setting timing it's a shunt wire.

Aug 27, 2008 | 1993 Oldsmobile Cutlass Supreme

Not finding what you are looking for?
2003 Mercedes-Benz S500 Logo

36 people viewed this question

Ask a Question

Usually answered in minutes!

Top Mercedes-Benz Experts

Colin Stickland
Colin Stickland

Level 3 Expert

22326 Answers


Level 3 Expert

79077 Answers

Joseph Prosser

Level 3 Expert

772 Answers

Are you a Mercedes-Benz Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides