Where is the vacuum on a Mercedes W124?
The solenoid manifold is now clearly visible to the left hand side, with many hoses leading in and out. We will first test the supply vacuum. Pull the line where it enters at the top of the solenoid manifold. Be very careful not to damage the hose or the manifold. Hook up your handheld vacuum pump and observe the gauge while starting the engine.
Why is my vacuum not working on my Mercedes?
Use you hand pump to test the various check valves and to pull vacuum on actuators, reservoir, and other moving mechanisms. In the case with this car the main culprit was the 5 way connector. It was original and swollen with oil vapor and did not grip the lines very well.
How to test yellow lines on Mercedes vacuum?
Replace the 2 one inch pieces of vacuum attached to the check valve also. To test the yellow lines, hook up your hand pump to each line with the other blocked off, and see if you can pull and hold a vacuum.
How does the a / C system work on a Mercedes Benz W124?
Firstly, an explanation is due. The A/C system in a W124 starts in a box that holds the condenser, and travels through lots of plastic ductwork to all of the different vents in the car. The flow to each set of vents is controlled by a door that is actuated with a vacuum piston.
The solenoid manifold is now clearly visible to the left hand side, with many hoses leading in and out. We will first test the supply vacuum. Pull the line where it enters at the top of the solenoid manifold. Be very careful not to damage the hose or the manifold. Hook up your handheld vacuum pump and observe the gauge while starting the engine.
Use you hand pump to test the various check valves and to pull vacuum on actuators, reservoir, and other moving mechanisms. In the case with this car the main culprit was the 5 way connector. It was original and swollen with oil vapor and did not grip the lines very well.
Firstly, an explanation is due. The A/C system in a W124 starts in a box that holds the condenser, and travels through lots of plastic ductwork to all of the different vents in the car. The flow to each set of vents is controlled by a door that is actuated with a vacuum piston.
How do you test a Mercedes Benz vacuum?
We will first test the supply vacuum. Pull the line where it enters at the top of the solenoid manifold. Be very careful not to damage the hose or the manifold. Hook up your handheld vacuum pump and observe the gauge while starting the engine. The vacuum should climb quite rapidly and hold steady.