Well now I'm not so happy. My CEL came on this weekend during frigid weather, and I finally scanned the code today. Much to my dismay I way met with code P0015. I have a CLK550 within the affected range. Am I correct that this is the touch of death, or was that only P0016/P0017. Please put my mind at ease as far as a $4000 repair.

 

Relax! P0016/P0017 is the dreaded "balance shaft" (or idler sprocket on the V8) failure. P0015 is just a bad camshaft adjuster solenoid (a.k.a. "cam magnet"). All four of those are about $100 total and it's a couple hours of DIY.

 

+1^ Relax!