Handling-wise, it's easy to drive considering its massive girth, though even the uprated 6.2 - liter V8 feels sluggish moving off the line; the numbers would indicate otherwise, and if you really stomp the pedal the Sierra roars to life, so I think it's a more a matter of
accelerator pedal travel than any lack of output.
For instance, our company standard dictates 45 mm [1.8 inch] maximum
accelerator pedal travel for the typical passenger car.
Not exact matches
At slower, stop - and - go speeds, however, the drivetrain has annoying
accelerator lag; in the first half - inch or so of
pedal travel, nothing really happens.
The bad news concerns the throttle response, which is Autobiography - relaxed over the first third of the
pedal travel and then suddenly Dynamic - rushed until the
accelerator hits the firewall.
Delve deeply into the long
accelerator -
pedal travel and the S550 can blast around slower - moving traffic, creating opportunities even in short passing zones.
It does this by changing the
accelerator mapping so that the same
pedal travel delivers less power than in the standard mode; the transmission control strategy for the automatic gearbox is modified to bring forward upshifts and delay downshifts, while intelligent energy and climate management reduces mechanical power consumption and also the energy consumption of electrical systems - such as heated mirrors and seats.
In Sport, the engine sent a whole lot of grunt to the front wheels at even a quarter throttle, while in Green or Mid modes, I could modulate the power through the entire
travel of the
accelerator pedal.
In ECO PRO mode, which operates with an adapted
accelerator pedal that demands less power, the possible distance
traveled increases by up to 12 %.
To resume
travel, the driver need only press a button on the steering wheel or tap the
accelerator pedal.
For example, the smaller stature of women is considered when determining seat -
travel measurements to ensure women can easily operate brake,
accelerator, and clutch
pedals, Lee said.
And, even in manual mode, the kickdown switch at the bottom of the
accelerator pedal's
travel isn't frozen out from proceedings.