id like to get it sorted asap while were off work so itll get the Mercedes diagnostic check on Monday for 99 quid.....hopefully that's productive. their master tech told me the other day that hes done a few of these older c63s with the same symptoms and its been a sticky injector....if the diagnostics isn't very conclusive ill just need to take it back and wait until my local independent specialist reopens as theyre quite good and think a bit more out of the box than just reading what a screens telling them....