The other day we had a very big snow storm here and the next day i went to start my ml 350 and notice my battery light blinking. i thought it was odd so i went an brought a new battery cost of 150.00 bucks....and then today went out and notice my gauges wasn't working right like my heated seat button was flashing, and my radio was fading in and out..when i was driving ... so when i arrive at my destination i cut off the car and then try to restart it and the battery was dead... i got a jump and make it back home so tell me now do you think its my alternator.....that i need to change now.......