The wife went to start the ML this morning and nothing. I jumped it and it started right up and ran okay. I looked for a light that got left on and would have killed the battery but couldn't find anything. I drove it to work, parked it and the ML's dead again. Now, the original battery was replaced with a new Bosch battery about 3 months ago. Do you think I got a bad battery that just refuses to take a charge or could it be something else like the alternator? 2002, ML320, 103K miles. Thanks for the thoughts.