If it fails (open) the power to the pump is interrupted. Lots of folks (including me) retract the roof until the rear window starts to fold, then get out of the car to adjust the rear window so that it is crease-free. I use a section of pipe insulation to keep the rear window from tightly folding. Then I get back in the car to finally stow the Has your convertible roof motor failed? Is the roof on your BMW Z4 stuck open or unable to open?In this video, I show you how to override your electric motor ***Before trying this, make sure that the luggage compartment lever in the trunk is set to the correct position. The luggage compartment lever is the most co dc_wright. Put the top down about 1/2 way to relieve the tension on the top gasket. Pull it back out of the channel in the body back to about the center of the trunk. Then push it back into the slot in the body starting with the end of the top gasket back about 1/2 inch from where it is now in your photo. If you cannot manually open the folding top then proceed to Section B. If you can accomplish the folding top removal procedure, check the hydraulic hinges for hydraulic fluid leaks after removing the top from the car. Any indication of hydraulic fluid signifies failed hinge seals. See Figure 2. In the event a hinge has a fluid They should not move. Once you have engaged the motors, go into your car put the key into the ignition and have the convertible top button pressed up (meaning to close the top), move the key to the accessory positio and hold it for 10-12 seconds. You will finally see the trunk lid get pulled closed. Remove the plastic panel from the front roof brace. Insert the Allen key in the uncovered internal hexagon. Lock and unlock the cowl panel lock by turning the Allen key. Take out and replace the Allen key. Emergency opening: Perform steps 1 and 2 as well as 5 to 7 from 'Emergency closing'. Unlock and open the cowl panel lock by turning the Check the switch located on the driver-side of the top frame. That switch is tripped when the top is fully closed to prevent the top motor from running when it has no work to do. Those have been known to fail. You can also check your brake light switch, which can cause top problems. - Derek. AawCBNI.