Is it the coolant light to the left of the temp gauge? If so raise the front end on jack stands, take the radiator cap off ,top off the radiator and start the car. Once it gets up to temperature the level will drop, top it off. You probably have air in the system. The warning light is a low coolant light. Check your resevoir.
Check all your hoses for small leaks. Not just the two big radiator hoses. Overheating a 7m is really really bad.
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Nate
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