Originally Posted by roadkillrob

Use the search button, I have a thread with all the parts in it and there are a few other threads like AMG3.2's headbolt adventure that are full of part numbers and pictures. Cam adjuster is the gear on the camshaft that also can set the variable timing and ultimately is driven from the cam chain. The lifters/buckets are the things that sit on top of the valves and the cam shaft lobes press down to open the valves.

Originally Posted by BLKROKT

The questions you’re asking mean that you shouldn’t even think about doing this yourself. Take it to someone who knows what they’re doing.

Originally Posted by ML63 AMG

Mine blew at 96,000 mi for what it’s worth. I realized it’s not mileage based.

What tends to cause them to fail is when you maintain very high revs (above 4000 consistently, and you get on/off throttle a lot above 5k (like in manual mode). The cam adjusters and cams really do not like that. Mine blew exactly when I was doing that.

‘Best way to avoid failure ironcilaly enough is commit to redline in every gear when WOT, do NOT let off above 5k before hitting redline. If you have to manually shift up a gear before getting off WOT doso but KEEP YOUR FOOT IN IT. That should help avoid the variable cam adjusters getting yanked in opposite directions very rapidly (which is what wears out the adjusters and causes them to fail (I speak form experience