The door panel has been off for several days, and haven't had time to look at the vacuum closely. The vac. element makes a loud hissing when locking and loud vibration when unlocking, until the pump stops working. It sounds like the pump is trying to keep pumping because it senses a lack in pressure. Is this normal? The noise lasts for 10-15 seconds. I'm currently debating whether to just go to the dealership and throw down $45 on a new element, but don't want to fix something that isn't broken. Thanks for all the suggestions so far.

Matt
1994 E320 (124)