HI everyone i'm new on here and i just wanted to know if anyone knows about the mercedes cls500 i don't know why my cls500 keeps dying after i park my car for a couple of days. The battery is new and so is the alternator. I brought it to the mercedes benz dealership and they don't know what the problem is. my car only has 40,000 miles on it. Does anyone know what could be the problem? Thank you!