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Hi, when the light flashes it is telling you that there is a fault in the top actuation system or the trunk lid is not closed fully or the luggage cover has come out of place in the trunk. You will need to check the trunk and the luggage cover and get the system scanned for fault codes. For now you can close the top manually. Click on the link below and scroll to page 291 for the procedure.
The fluid level in the pump should also be checked. If there is a leak in the system it could cause the problem although I would still expect the windows to lower if the fluid level was low. Most likely this is an electrical fault with one of the micro switches or relays or with the pump itself.
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