haha.
I can see why the question was asked, I was chatting to our work experience student at work before the race and we were talking about the advantages of Mercedes throwing a race or 2 to the opposition 'to help the show' (although we went with Canada and Monza as it would be easier to throw with Williams and Ferrari faster in straight lines)
If I was Mercedes I would definitely 'mess' with results in order to stop any talk of engine equalisation and keep my advantage although I think that says more about me than Mercedes.
Anyway - to answer the question - NO!
for several reasons. The 1st being that this was pretty much a home race for the brand and with no German GP it becomes more important.
The 2nd - they didn't need to lose the race to shut the critics up - just dial back the performance enough to race with Ferrari but use the extra performance to ensure the win - it would still have been a great race that showed Ferrari 'had caught up'
The 3rd reason - Mercedes still seemed to have a similar advantage over the rest of the field (the other teams were just as far away as Melbourne and last year so it suggests Mercedes were not going slower) - it was Ferrari that moved forward (when compared to Williams for example) Whatever the reason Ferrari were able to extract more out of their car in those conditions than everyone else.