Apparently, Ron Dennis was asked about the button after the 1998 Brazilian GP. (Coulthard had the button on the right-hand side.) https://forums.autos...-2000/?p=216565
A FRESH CONTROVERSY IN THE OFFING?
Italian TV commentators were yesterday harping upon a green button on the right hand side of the McLaren steering, blatently suggesting that this is an electronic form of traction control and practically blaming it for the “silver arrows” domination.
This was, in turn, referred to by McLaren boss Ron Dennis. “Have you seen our drivers using a button on the steering wheel on TV? Now, we’ll be accused of having another illegal gadget,” he said, adding that it is a perfectly legal system which cannot be contested. He declined to qualify its function, however.
Ron Dennis was once again radiant after the team’s third one-two victory which proved his previous contention that the brake system, contested so vehemently by Ferrari, was not the cause of their outstanding performance.
With regard to team orders, Coulthard confirmed that Dennis had directed his drivers not to crash out of the race at the first corner. Although Hakkinen lead from start to finish without actually being challenged by his team-mate, this stands to be reviewed from the Argentine GP, the next on the calendar. The two drivers will be free to fight each other to the end.
The two drivers confirmed they encountered no problems during the race except for the tyres’ temperature that rose beyond the norm in the final stages of the race. This confirms the signs shown by the McLaren pits to both drivers to ‘cool tyres’.
Two races, two doubles - three if taking Jerez into account. “With the contribution of Bridgestone and Mercedes, Dennis pointed out, quickly adding that the team still has to improve, a frightening prospect.