I have had the same problem with the vacuum device that suddenly hung, I made made a new bracket that works. But it seems like vacuum device does not work more before when I læftede lamps by hand, there was resistance and a hissing sound, there is no more, is there anyone who has experience with this vacuum unit, can you do something yourselve or is it an exchange?
Is there a way to easily check the entire vacuum system for leaks?
The black plastic box Michaeltalbot writes about, it is the vacuum gizmo to up / down to see image?
Kim
The "gizmo" in the picture is the valve that switches the vacuum from one side to the other of the membrane in the vacuum motor. The vacuum motor can only be accessed from below, unless you remove the battery and take the fiberglass shield out of the front. (But don't do that for this problem)
With the engine running, you should not be able to lift the lights by hand. If you can, there is a serious vacuum leak or a busted membrane.
You can do a number of tests by removint the valve. In the two hoses that go down, the one towards the front suck the lights down and the other lifts them. Place a small hose into the tubes and suck with your mouth. Block the tube with your tongue and wait some time. If there is still vacuum, the membrane should be OK. If no vacuum, it could be the membrane, but also the hose. The vacuum actually runs in plastic tubes connected at the ends with the pieces of rubber hose you see on the valve and they often split at the ends. With the valve off you can suck on the single pipe and by pushing the plunger in, check that it is working and not leaking. Put a finger alternatingly on the two pipes to verify that there are no leaks. (If one of the two tubes drop under the fiberglass shield you can reach them from the fender well.)
If all that is OK you need to check in the engine bay. The odd shaped plastic bottle in the right side corner behind the engine, is the vacuum reservoir. On mine the rubber tube on top had a 1" split. The rubber dries out due to the heat in the compartment and you would do yourself a service by replacing all those vacuum tubes. If you have vacuum leaks, the engine will most likely not run at its best.
So, welcome to the joy and challenges of the old, but seriously-fun-to-drive Murena.