Just to calm your nerves;
A very good friend of mine works for Mercedes commercial as a head technician and I've shown him this thread and what his thoughts were.
In the four-five years that Mercedes have been putting the V6 CDi into their commercials, he has never once seen this problem. Ever.
They put through 60-100 job cards A DAY, so if there was this mass epidemic of this failing, he'd have seen this by now I'm sure.
thats very interesting sweetpea because i just spoke to guys at pcs and they said its quite common..........
not sure who to beleive..