Lexus ES 350 Owner's Manual page 122

2-1. Driving procedures
CAUTION
If the power brake assist function does not operate, do not follow other vehicles
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closely and avoid downhills or sharp turns that require braking.
In this case, braking is still possible, but it will require more force on the pedal than
usual. Braking distance may also increase.
Do not pump the brake pedal if the engine stalls.
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Each push on the brake pedal uses up the reserve for the power-assisted brakes.
The brake system consists of 2 individual hydraulic systems: if one of the systems
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fails, the other will still operate. In this case, the brake pedal should be depressed
more firmly than usual and braking distance becomes longer.
Do not drive your vehicle with only a single brake system. Have your brakes fixed
immediately.
NOTICE
While driving the vehicle
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Do not depress the accelerator and brake pedals at the same time during driving,
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as this may restrain the engine output.
Do not use the accelerator pedal or depress the accelerator and brake pedals at
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the same time to hold the vehicle on a hill.
When parking the vehicle
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Always put the shift lever in P. Failure to do so may cause the vehicle to move or the
vehicle may accelerate suddenly if the accelerator pedal is accidentally depressed.
Avoiding damage to vehicle parts
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Do not turn the steering wheel fully in either direction and hold it there for a long
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time.
Doing so may damage the power steering pump
When driving over bumps in the road, drive as slowly as possible to avoid damag-
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ing the wheels, underside of the vehicle, etc.
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