It's a known issue and there's a known fix so just take it in.
After half a dozen restarts the CEL will clear usually.
The issue is the wiring isn't long enough and (as the engine moves around, particularly under heavy acceleration) it pulls on the socket. The fix, as previously mentioned, is a harness extension. I don't think there's much you can do without getting the extension fitted to resolve it.
I think Brooking got an E63 AMG by the way, although he does still hanker after a Quadrifoglio.
I suspect there's a bulletin on it. If not, the dealer needs to raise a case with AR Technical and they'll tell them what the fix is. In my case AR UK Technical had to get AR Italy involved but UK should be well aware of this issue and the fix by now.
Last edited by smarty156; 23-03-19 at 13:05.