Esteban Gutierrez has revealed that Sauber are having problems with the new brake-by-wire system in their 2014 car.
Sauber have struggled with the new system - which adjusts brake balance electronically in order to facilitate the effective harvesting of energy by the recovery systems - throughout pre-season, which is the reason behind Adrian Sutil's off-track incidents at Jerez and Sakhir.
"As a driver it's all based on the feeling because obviously you need to communicate with the team what you feel and what you need to be more confident and to get more performance from the car," Gutierrez told crash.net when asked about the car's brake balance.
"This is affecting the car...
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