MPG AUDI S8 2012 Owners Manual

24 Instruments and warning /indicator lights
ca used by the he at being radiated from
t h e engine.
- Y ou can se lect the units used for temper­
atu re, speed and other measurements i n
the MMI.
- Fo r i nforma tion on the a udio/video and
navigation* functions, refer to the se pa­
r ate MMI owner's manual.
Operation
The driver information system is operated us ­
ing the buttons on the multifunction steering
wheel.
en
~------,~
;;i,
Fig . 6 Mult ifunct io n steer in g whee l: ope rat ing t he d riv ­
er informa tion sys tem
Fi g. 7 Driver info rm ation system : open ing t he ve hicle
f unct io ns m en u
Operating concept
.. Switch the ignition on.
.. To sw itch between the tabs, press the rock­
er switch @to the left or right¢
fig. 6.
.. To access addi tional info rmat ion be low or
above, rotate the thumbw heel @ dow n or
u p.
.. To confi rm a se lecti on, press the thum b­
w hee l@ .
Accessing Vehicle functions
.. Sele ct the first t ab with the ro cker swi tch
@ .
.. Press the button ~-Th e Vehicle funct ions
menu appears ¢ fig. 7.
.. To se lect a menu item, turn and press t he
thumbwheel @.
Resetting values to ze ro
.. Select the on-board computer / Efficiency
program
menu item in the Vehicle func­
tions
menu .
.. Yo u can now select between the long-term
memory and s hort-term memory .
.. To reset the values in a memory, p ress a nd
hold the thumbwheel @ for one second .
The last function selected d isp lays when you
switch the ignition on .
On-board computer
You can call up the fo llowing info rmation in
the on -board computer:
- Dat e
- Dr iving t ime ( h) from the short-term memo-
ry
- Average cons umption in MPG ( l/100 km)
from the short-te rm memory
- Average speed i n mph (km/h) from the
short-te rm memory
- Dis tance driven in miles (km) from the
short-t erm memory
- Cur ren t fu e l consumption in MPG ( l/100
km)
- Short -te rm memory overview
- Long-term memory overview
T he short-te rm memory collects dr iv ing infor ­
mation from the time the ig nition is switched
on until it is switched off. If you continue driv­
i ng within two ho urs after switch ing the ig ni­
tion off, the new values are included when cal­
cu lating the c urrent t rip information .
U nli ke the short-term memory , the long-term
memory is not erased automatically . You can
select the time period for evaluating trip in-
format io n yourself . ..,.

198 Driving and environment
Fewer short trips
Fuel consumption will always be relatively
high on short trips .
.,. Try to avo id driving short distances with a
cold eng ine.
The engine and catalyt ic converter have to
reach their optimal
operating temperature to
reduce fuel consumption and noxious emis­
sions effect ively .
Just after starting, a cold engine in a mid-size
car only achieves a f uel economy of 6-8 miles
per gallon (30-40 l/100 km). After about a
half a m ile, fuel economy climbs to 12 mpg
(20 l/100 km). After about
2.5 miles (4 km),
the engine is at its proper operat ing tempera­
ture and fue l economy has reached a normal
l eve l. So you can see that you sho uld avoid
short trips wheneve r possible.
The
outside temperature is also critical in this
r egard. Your car consumes more fuel in the
winter than in the summer.