2008 fortwo with 77K miles. Left work, car was shifting a little harder than usual. As I approached a traffic light I began to brake, but the brakes didn't seem to engage fully. Next the engine starts running extremely rough and the transmission kept going between neutral and drive. I shut off the engine, but it would not restart. I turn the key and all I get is a beeping noise. The starter does not try to engage. Battery is strong. Could this be the clutch actuator or might it be something in the electrical system? Thanks in advance for any thoughts.