What are you on.
There would be people at Mercedes analysing the qualifying session. they will be in contact with Michael's race engineer. If they say he should go out again, he would go out again. He's hardly going to say, no thanks guys.
Anyway, as we've now seen, Merc had a technical issue, so it makes no odds. Had the Caterham not improved by 1.4 seconds, Michael might not have been able to run again anyway.
Indeed, MS would be listening to what the team was saying.