TJ13 has plotted the various explanations Mercedes have given for the issues Nico Rosberg suffered with power units las time out in Monza.
Plan one for this weekend, was Rosberg would use the ‘new’ PU#3 which was switched out of the car as a precaution before qualifying in Italy.
TJ13 questioned the wisdom of this move, given explanations from Andy Cowell suggesting there were at one point gasket head concerns with this PU.
Mercedes plan two was that Rosberg would use PU#3 only on Friday, and on Saturday and Sunday use a fourth new PU, which is Rosberg’s final penalty free engine of the season.
Now Mercedes have changed their minds again. When the car was presented for scrutineering today, the power unit in Rosberg’s car was the new PU#4. TJ13 has learned Mercedes do not want to lose any track time in Singapore due to the complex nature of the setup required and this unit will now be used all weekend.
Nico’s PU#3 will re-appear on Friday in Japan.