Mercedes admit they have needed to calm the situation between team-mates and rivals Lewis Hamilton and Nico Rosberg in recent weeks.
Tensions between the two title rivals were exacerbated by the last race in Hungary, during which Hamilton refused team orders to let Rosberg through.
Hamilton says the team have since reassured him he did nothing wrong.
Mercedes boss Toto Wolff said the drivers had needed “a bit of mediating, management, caressing, hard words”.