Over a 2 day period the vacuum shutoff took longer and longer until now it does not shut off without manually moving the shutoff lever.

Using a MityVac (Harbor Freight $16.95) the shut off works perfectly with one or two pumps.

With the MityVac attached to the main line from the Vacuum Pump attached where the shut off line comes off, with the engine running, I show no vacuum at all.

The brakes seem to work perfectly, I have harsh shifts, and the climate control works but the center vents and the floor vents do not open.

Is is time to rebuild the Vacuum Pump?? It looks like I have the later version pump.

Any thoughts??

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1987 300TD 440K - My car
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2000 - CLK320 100K - Deb's car
1994 C230 150K - Josh's Car