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由 Nicolas Siemsen — 编辑

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[* black] With your hand vacuum pump connected to the solid yellow line, with no stripes, you can continue. Go to yourMake sure the driver's door, which should be close at this timeside door is closed, and turn the key in the door theto the unlocklock position. Pull a vacuum of 10 to 15Hg; all the doors on the car should unlocklock. Wait about 5 minutes to see if the unlocklock side of the system holds.
[* black] If you haven't already, remove your driver's side door panel. The door panel removal technique guide is available in the Mercedes W123 repair section. [guide|20198|Click here to read that guide.]
[* black] With your hand pump still connected to the solid yellow line, move the key in the driver's door to the locked position. Pump vacuum again at 10 to 15Hg. The doors should all lock. Leave this vacuum again for about 5 minutes. Make note ofunlocked position and open the resultdoor.
[* black] With your driver's door panel removed you can watch one of the actuators during this process. The door panel removal technique guide is available in the Mercedes W123 repair section. [guide|20198|Click here to read that guide.] Pictured are the early style actuators. The first picture shows the door in the locked position while the second shows it unlocked.
[* black] Pump vacuum again at 10 to 15Hg. The doors should all unlock. Retain this vacuum again for about 5 minutes. Make note of the result.
[* black] With your hand vacuum pump connected to the solid yellow line, with no stripes, you can continue. Go to yourMake sure the driver's door, which should be close at this timeside door is closed, and turn the key in the door theto the unlocklock position. Pull a vacuum of 10 to 15Hg; all the doors on the car should unlocklock. Wait about 5 minutes to see if the unlocklock side of the system holds.
[* black] If you haven't already, remove your driver's side door panel. The door panel removal technique guide is available in the Mercedes W123 repair section. [guide|20198|Click here to read that guide.]
[* black] With your hand pump still connected to the solid yellow line, move the key in the driver's door to the locked position. Pump vacuum again at 10 to 15Hg. The doors should all lock. Leave this vacuum again for about 5 minutes. Make note ofunlocked position and open the resultdoor.
[* black] With your driver's door panel removed you can watch one of the actuators during this process. The door panel removal technique guide is available in the Mercedes W123 repair section. [guide|20198|Click here to read that guide.] Pictured are the early style actuators. The first picture shows the door in the locked position while the second shows it unlocked.
[* black] Pump vacuum again at 10 to 15Hg. The doors should all unlock. Retain this vacuum again for about 5 minutes. Make note of the result.