Master Element - Page 2 - PeachParts Mercedes-Benz Forum

uberwasser · #16 08-18-2014, 06:26 PM

Is the X you're talking about still on the unlock side (green stripe)? If so I'm thinking that it is feeding both of your passenger doors, and the trunk lock.

There should be a line coming from the driver's side of the car - that is the line from the master switch.

There should be a line that goes up under the dash. That goes in to your passenger front door to feed that actuator.

Then there should be two lines heading back towards the rear of the car. One goes in to the rear passenger door to feed that actuator, the other continues on to feed the rear hatch actuator.

I'm beginning to lean towards one of the unlock lines going in to the passenger door (either front of rear) is broken at the hinge. Hence the fast leak, fast enough that you can't build any vacuum.

One way to confirm this is to open up the door panels again (just those two this time), plug off the unlock line where it would normally connect to the actuator (golf tee or something similar plugged in to the rubber connector end), and then see if you can pull a vacuum at the line that is going in to the X connector in the passenger floor pan. If you cannot, the line is broken in between.

snorider · #17 08-18-2014, 08:41 PM

Quote:

Originally Posted by uberwasser

Is the X you're talking about still on the unlock side (green stripe)? If so I'm thinking that it is feeding both of your passenger doors, and the trunk lock.

There should be a line coming from the driver's side of the car - that is the line from the master switch.

There should be a line that goes up under the dash. That goes in to your passenger front door to feed that actuator.

Then there should be two lines heading back towards the rear of the car. One goes in to the rear passenger door to feed that actuator, the other continues on to feed the rear hatch actuator.

I'm beginning to lean towards one of the unlock lines going in to the passenger door (either front of rear) is broken at the hinge. Hence the fast leak, fast enough that you can't build any vacuum.

One way to confirm this is to open up the door panels again (just those two this time), plug off the unlock line where it would normally connect to the actuator (golf tee or something similar plugged in to the rubber connector end), and then see if you can pull a vacuum at the line that is going in to the X connector in the passenger floor pan. If you cannot, the line is broken in between.

The problem is on the lock side red stripe between the X on the passenger side floor and the hatch lock actuator/ gas door, there is a Y (somewhere) that I need to find it is lower right on this diagram

snorider · #18 08-20-2014, 06:56 PM

Found it! The Y is under the inner fender cover on the passenger side. You have
to remove the right rear center pillar

http://www.startekinfo.com/StarTek/outside/12265/disc_2/program/Chassis/68-476.pdf

And then the inner fender cover to access it.

The big vacuum leak is in the hard line between Y under the fender cover and the hatch lock actuator. Anyone ever pulled new hard line to the hatch? it goes up and under the headliner, yikes. I removed the offending line from the system and every thing works now. Excluding the hatch lock of course.

uberwasser · #19 08-20-2014, 07:35 PM

If you tape some new hard line to the old hard line, you should be able to pull it through.

Glad you found the leak.