I'm new to Mercedes, and I can't figure out how to tell the oil life. There is an oil <em>level </em>indicator but no oil <em>life </em>indicator?<br/>I'm at 13,000 kilometers now and am planning on a 3000km journey in a few weeks. <br/>I can't find ANY information on when I should expect my first oil change. Nor can I find ANY info in the manual. What the heck is with this manufacturer??