Try to start my 2008 CL63... loud bang! Vapor pours out... battery blew up. Crazy, but apparently it happens! So I go to Autozone and get a battery...wrong one. I need the starter battery. Go back, they call Mercedes and get told it’s dealer part only... ha! Ok Mercedes I know your bull****. Remove destroyed battery and peel label back..guess what? H6 battery with Mercedes label slapped over it. $20 for baking soda(neutralize battery acid), $5 for gloves, $180 at Autozone or Batteries Plus and done. Hope that helps forum members. I’m sure it also applies to S63