I have a 55 plate Roadster. Took her out for the first time after storing her in a nice warm dry garage over the winter. At the appointed speed the rear spoiler started to deploy but only partially. I then noticed that the spoiler switch on the lower dash was flashing a red light. On reaching 90mph the warning beeper sounded, and would only stop of I dropped my speed. When I stopped I could only get the spoiler to detract after I had turned off the ignition and the turned the ignition back on. With the car stationary I operated the spoiler using the switch and it is only partially deploying. It lowers OK using the switch. Any ideas / suggestions on this? Seems electronic problem may be the cause, but should I take it to a Merc dealer and let them hook it up to diagnostics? Or find a local Crossfire specialist? Any help would be much appreciated.