I've done 30,000 km service on last Saturday, 1 Mar, 14. Sometimes, The Radio comes ON by its own, after I take out the key and lock it. I have observed it few times. I am worried if it would drain my battery. Has anyone faced this issue? What could be the reason? There was nothing special in the service, except, the SA said there was a coolant leak and EGR had to be cleaned. They did so, along with fixing the coolant holder again.