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This car has several computers that need to have faults cleared for the systems to restart proper operation. The suspension light is on because the steering angle sensor needs to be reset. The start / stop switch might be unrelated as it is a two position switch. When you depress the switch can you feel both positions? For the A/C is the ECON soft switch active? the compressor is constantly engaged but this may be due to the stored faults. Do you have away to check the fault codes? -Colin-