I am following this thread, it seems as though our vehicles have the same problems...so far I have swapped k40 to no avail...seems you went the other route with SOV first to no avail....I am very interested in whether or not the new k40 along with new SOV fix your problem.

I hate throwing parts at cars, but these w210 om 606's fuel systems are pretty lame!! hard to diagnose without WIS I guess.

keep us updated!
Ian