My rear doors lock but will not unlock. I looked under the seat at the PSE and see six yellow lines and one white. I was hoping to find a way to use a mityvac and identify the six but it appears they are permanently attached to the PSE pump.

What are the odds both rear door acuators are bad? It seems strange to me that they will lock but not unlock.

Can anyone explain the W210 rear door lock system? I hate to have to remove the panel.