Here’s an interesting nugget from Mark Hughes’ Monaco Grand Prix report in Autosport:
There is a piece of electronic trickery on the McLaren, which has been on both cars all year, and Button is now feeling it may be confusing his feel for the car, causing him to make poor set-up choices.
Or this could be an electronical “driver-aid” not like TC, but like an electronic motor in the servo changing the steering from linear to exponential, or heating pads near the wheels, or anything within the rules. Just because Button said it it does not mean it is just an excuse, it might be true.
I haven’t heard about any system, but we know Mercedes lost the fired overrun system as part of the EBD ban. This offset the brake balance shift with KERS, last year it also served as the hot blown mapping for off throttle diffuser blowing.
May be the system is a new mapping solution to replicate this.
We know that Button doesn’t like imbalance in the chassis, especially at the rear, perhaps the new system isn’t working as it should.