Force India's Formula One team has put on hold the new KERS system it had planned to introduce at this weekend's Spanish Grand Prix.
he optional kinetic energy recovery system offers drivers a power boost at the push of a button but only a handful of teams have used it so far this season.
Force India introduced a new rear diffuser and aerodynamic developments to their Mercedes-powered car at the previous race in Bahrain and plan further upgrades for Barcelona.
