Mitsubishi 2010 RVR Owner's Manual page 207

Features and controls
To increase your speed in small amounts, press the "ACC
RES" switch for less than about 1 second and release it.
Each time you press the "ACC RES" switch, your vehicle will
go about 1 mph (1.6 km/h) faster.
Accelerator pedal
While driving at the set speed, use the accelerator pedal to
reach your desired speed and then press the "COAST SET"
switch (B) and release the switch momentarily to set a new
desired cruising speed.
3
3-110
To decrease the set speed
There are 2 ways to decrease the set speed.
"COAST SET" switch
Press and hold the "COAST SET" switch (B) while driving at
the set speed, and your speed will slow down gradually.
When you reach your desired speed, release the switch. Your
new cruising speed is now set.
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