Newbie owner here. 2005 325xi. Been reading threads on coolant. When checking my car this morning the service engine soon light was on. Took the gas cap off and put it back on. Turn the car back on and along with the service engine soon light, the coolant light came on as well. Check the reservoir and it is either empty or very very low. No puddles in the driveway. Car is not overheating. In checking with the auto parts stores around town, they stated that ethylene glycol was the main ingredient used for the coolant. Of course it's Sunday and Bimmer shop is not open. Need to use the car Monday. How detrimental would it be using Peak to top off the reservoir?