Is there a vacuum system on a Mercedes?
Vacuum, vacuum everywhere, or you wished it was. To many owners of the older Mercedes diesel cars, the vacuum system continues to be an amazing mystery. Full of weird components and even weirder operation of all kinds of stuff on the car. Well I am here to tell you today, it is not that complicated and mysterious.
What happens when Mercedes diesel engine is not running?
As Mercedes DPF traps and holds soot, with time it reaches a point when it needs to be ‘emptied out’. This is done by regeneration. During this automated process, engine computer rises exhaust gasses temperature over 630°C. This burns up soot particles. However, if the engine is not running correctly automatic regeneration will not be started.
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.
Why is my dashpot not working on my Mercedes vacuum?
Because the dashpot is being supplied by the 3 way connector and that is connected to the metering valve in the supply line. The metering valve is designed to restrict the vacuum going to this area. Replace the dashpot and the connector if necessary. Next we turn out attention to the big culprits to vacuum leaks.
Vacuum, vacuum everywhere, or you wished it was. To many owners of the older Mercedes diesel cars, the vacuum system continues to be an amazing mystery. Full of weird components and even weirder operation of all kinds of stuff on the car. Well I am here to tell you today, it is not that complicated and mysterious.
What to do if your Mercedes vacuum starts leaking?
Be very careful removing the 2 connectors from the supply line metering valve. The nipples are small and very fragile and prone to cracking. If one breaks you will have to replace the entire line. Its not very expensive, but if it is not is perfect condition, then it will leak. Next is the green vacuum dashpot for the transmission.
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.
Because the dashpot is being supplied by the 3 way connector and that is connected to the metering valve in the supply line. The metering valve is designed to restrict the vacuum going to this area. Replace the dashpot and the connector if necessary. Next we turn out attention to the big culprits to vacuum leaks.
Be very careful removing the 2 connectors from the supply line metering valve. The nipples are small and very fragile and prone to cracking. If one breaks you will have to replace the entire line. Its not very expensive, but if it is not is perfect condition, then it will leak. Next is the green vacuum dashpot for the transmission.
Where is the Baby Blue Line on a Mercedes?
The solid brown line is the ignition switch supply line. The brown with blue stripe is to the fuel shut off valve. The green with yellow stripe goes to the HVAC system. The baby blue line supplies the seat back restraint system on 2 door models.