The car is at the dealer now getting engine mounts, but this noise is what’s worrying me. It sounds an awful lot like rod knock, which would mean death for the engine. Being that it was caused by the accident, if insurance decides to total it from this, which they absolutely would, it would mean death for the S600. I love this car, but this might be a sign to just get something newer. What would you do, drop a new (to me) V12 into this, or ditch it for a CPO W222?