dead island mechanic glitch

Do you have problems with Chapter Broken Bird?

During the protect-the-mechanic mission, there seems to be a glitch when 6 zombies are waiting the mechanic outside the garage.

Simple! First, you must not park the car near the red circle. Alight, then walk on foot & go finish off the zombies. Once the coast is clear, now get back into the car & drive it into the red circle. Leave the car. Voila!