Here are a few more.
EGR valve pipe blockage at intake
EGR valve part upgrade
Spark plug boots/resistors under coils [ 3 of them]
Rear thrust arms [ have been modified]
Start lock-out switch on trans [ suspectical to water]
Belt tension shock bushing wear [ rattle at idle]
Upping of fuse on aux fan high speed relay [ per Benz]
Right motor mound collapse [ heat ]

All pretty minor and most are DIY, if so inclined.

There are more, but these are common,,,