light AUDI S4 2014 Owners Manual
[x] Cancel search | Manufacturer: AUDI, Model Year: 2014, Model line: S4, Model: AUDI S4 2014Pages: 296, PDF Size: 73.56 MB
Page 188 of 296

186 Intelligent technology
Intelligent technology
Notice about data
recorded by vehicle
control modules
Your veh icle is not equipped with an Event Da
ta Recorde r (EDR), ins talled by some manu
facture rs fo r the express p urpose of capturing
data for retrieval after an accident or cras h
event . EDR's are sometimes ca lled "crash re
corders".
Some state laws restr ict the retr ieval or down
loading of data stored by EDR's that were in
stalled in a vehicle for the express purpose of retrieving data after an accident or crash
event without the owner's consent.
A ltho ugh yo ur vehicle is not equ ipped wit h an
EDR, it is equipped with a number of electron
ic control modules for various vehicle systems
such as, for examp le, eng ine f unction, em is
sion control, as well as for the airbags and
safety belts.
These electronic contro l modules also record
vehicle-re lated data during norma l vehicle op
erat ion for diagnostic and repa ir purposes.
The recording capacity of the electronic con
trol modules is limited to data (no sound is re
corded) and only a small amount of data is ac
tually recorded ove r a ve ry limited pe riod of
time and stored when a sys tem faul t or o ther
cond ition is sensed by a cont ro l u nit. Some of
the data then stored may re late to vehicle
speed, direction, braking as we ll as restraint
system use and performance in the event of a
crash or other condit ion. Stored data can only
be read and downloaded w ith special equip
ment.
Electronic Stabilization
Control (ESC)
Description
ESC helps to improve road holding and vehicle
dynamics to help reduce the probability of
skidd ing and loss of ve hicle control. It works
only when the eng ine is running. ESC detects certain difficult driving situat
ions, including
when the vehicle is beginning to spin (yaw)
o ut of control and he lps you to get the veh icle
back under control by se lectively braking the
whee ls, and/or reducing eng ine power and
providing steer ing ass istance to he lp hold the
vehicle o n the dr iver's intended course. The in
dicator light
J.i) in the instrument cluster
blinks when ESC is ta king action to help yo u
control the veh icle.
ESC has limitations.
It is importa nt to remem
ber that ESC cannot overcome the laws of
physics. It will not always be able to help out
under a ll cond it ions you may come up aga inst.
F or example, ESC may not always be able to
help you master situations where there is a
s u dden change in the coefficient of friction of
the road surface. When there is a section of dry road that is sudden ly covered w ith water,
s lush or snow, ESC cannot perform the same
way it wou ld on the dry surface . If the ve hicle
hydroplanes (rides on a cushion of water in
stead of the road surface), ESC will not be
able to help you steer the vehicle be cause con
tact with the pavement has been in terrupted
and the vehicle cannot be braked or steered .
D uring fast cornering, particularly on winding
roads, ESC cannot always deal as effectively
with difficult driving situations than at lower
speeds. When towing a trailer, ESC is not able
to help you regain control as it would if you
were not tow ing a trailer.
Always adjust your speed and driving style to road, traffic and weather condit ions. ESC can
not override the vehicle's physical limits, in
crease the availab le tract ion, or keep a ve hicle
on the road if road departure is a result of
driver inattent io n. Instead, ESC imp roves the
poss ibil ity of keeping the vehi cle under con
trol and on the road during extreme maneu
vers by using the d river's steering inputs to
help keep the vehicle going in the intended di
rection . If you are traveling at a speed that
ca uses you to run off the road before ESC can
provide any assistance, you may not experi
ence the benefits of ESC.
Page 190 of 296

188 Intelligent technology
-Always accelerate with special care on
even, smooth surfaces such as those that
are wet or covered with ice and snow.
The drive wheels can spin even with
these assistance systems that cannot al
ways help to reduce the risk of loss of ve hicle control.
(i_) Tips
-ABS and ASR only work correctly when
all four wheels are equipped with identi-
Switching on/off
cal tires. Different tire sizes can lead to a
reduction in engine power.
- You may hear noises when the systems
described are working.
- If the indicator light
bl or t!lJ (USA
models)/[IJ (Canada models) appears,
there may be a malfunction
¢page 18,
¢page 19.
ESC turns on automatically when you start the engine.
Fig. 174 Version A: lower center console,~ OFF but·
ton
The ESC is designed to function in levels. De
pending on the level that is selected, the sta
bilization function of the ESC is limited or
switched off. The amount of stabilization con
trol will differ depending on the level.
The following situations are exceptions where
it may be useful to switch on sport mode (Se
dan) or offroad mode (allroad) to allow the
wheels to spin:
Fig. 175 Version B: upper center console,~ OFF but·
to n
-Rocking the vehicle to free it when it is stuck
- Driving in deep snow or on loose ground
- Driving with snow chains
- allroad: Driving on rough terrain when much
of the car's weight is lifted off the wheels
(axle articulation)
- allroad: Driving downhill while braking on
loose ground
Page 191 of 296

Intelligent technology 189
Sedan: ESC levels
Sport mode on ESC/ASR off Sport mode off or
ESC /ASR on
Behavior
The ESC and ASR stabiliza- The stalbilization f unct ion The fu ll sta bilization f unc-
tion funct ions are lim ited is not ava ilable
c:> A . ESC tion of the ESC and ASR is
c:, A . and ASR are sw itched off. available agai n.
Operation Press t he I~ OFF I button Pre ss and h old t he I~ OFFI Press t he i.i, OF FI bu tton
briefly. bu
tton longer than 3 sec -
aga in .
o nd s.
Indicator II turns on. II an d II turn on . II turns off or fl and II
lights tur n off.
Driv er mes· Stabilization control Stabilization control Stabilization control
sages (
ESC) : Sport . Warning! (ESC): off . Warning! Re- (ESC) : On
Restricted stability stricted stability
allroad: ESC level s
Offroad mode on Offroad mode off
Behavior
The ESC and ASR stabilization funct ions T he full stab ilizat ion function of the ESC
are limited
c:> A .
Operation Press the I~ OFFI bu tton.
Indicator II tur ns on.
light s
D river mes- Stabilization control (ESC ): Offroad.
sages Warning! Rest
ricted stability
It is on ly possible to t urn off the AS R up to 30
mph (SO km/h) f or veh icles with front whee l
drive. At about
45 mph (70 km/h) it a utomat i
cally turns on aga in. It is poss ible to turn off
the ASR at any speed for veh icles with all
wheel dr ive .
A WARNING
-
Yo u should o nly sw itch sport mode/off
r oa d m ode on or swi tch E SC/A SR off if your
d rivi ng abili ties a nd ro ad con ditio ns per
m it .
- T he stabili zation fu nction is limited
w he n sp ort m od e/off road mode is
switched on . The driving w heels could
s p in and t he vehicle c ould swerve, es pe
c ia lly on s lick or slipp ery roa d sur faces .
- all road: Yo u should o nly sw itc h off roa d
mode on when driving offroad .
- S edan: There is no vehicle sta biliz atio n
w hen ESC/AS R are switched off . and ASR
is availab le aga in.
Press t he
I~ OFF I button again .
II turns off.
Stabilization control (ESC ): On
(D Tips
ESC/ASR cannot be switched off o r sp o rt
mode/offroad mode ca nnot be switched
on when adaptive cruise control * is switch
ed o n.
Braking
What affects braking effic iency?
New brake pads
D uring the first 250 mi les (4 00 km), new
brake pads do not possess the ir full brak ing
effect, they have t o be "broken in" first
c:> A .
You can compensate for this slightly reduce d
braking powe r by pushing har der on the brake
p edal. Avo id heavy b ra ki ng loa ds dur ing t he
break-i n pe riod.
•
•
Page 193 of 296

th e brakes or hold the pedal down too
long or too ofte n. This cou ld cause the
brakes t o get hot and dimi nish b raking
efficiency .
- Do not "r ide t he b rakes" by resting your
foot on the pedal when you do n ot intend
t o brake . Th is may cause the brakes to
overheat, premature wear and increased
stopp ing distance.
- Under certa in climat ic and operating
condit ions such as passing through wa
ter, driving i n heavy rai n or after wash ing
the vehicle, the effe ct iveness of the
brakes can be re duced. In winter, ice can
acc umulate on the brake pads, linings,
discs and drums. Carefully apply brakes
f or a test. Brakes will dry and ice coat
ings will be cleaned off after a few care
ful brake app lications.
- Driv ing for an extended period of time on
salt-covered roads w ithout using your
brakes can also affect braking efficiency .
Clean off accumulated salt coating from
brake discs and pads w ith a few caref ul
brake applicat io ns.
- If you damage the front spo iler, or if you
install a diff ere nt spoiler, be sure the air
flow to t he front b ra kes is not obstr uct
ed . Otherwise the br ake sys tem co uld
overheat red ucing the effectiveness of
the ent ire brake sys tem.
- F ailure of one br ake circui t will im pair
the brakin g capability res ulting in an in
creased stop ping distance . Avoid driving
the vehicle and have it towed to t he near
est author ized Audi dealer or qualified
workshop.
- Never let the vehicle ro ll to a stop w ith
the engine shut off.
- If the brake booster is not work ing, the
brake pedal must be pressed considera
bly harder to make up for the lack of
booster assistance.
Int ellig ent technolog y 191
Electro-mechanical
power assist, dynamic
steering
The electro-mechanical power assist helps
t he driver when steering.
Power steer ing adap ts electronically based on
t he ve hicl e spee d.
Indicator lights and messages
• Steering defect ive! Do not drive vehicle!
If this indicator light turns on and stays on
and t his message appears, the power steer ing
may have failed.
Do
not continue driving. See your authorized
Audi dealer or a qualified repair facility for as
s istance.
':rij Dynamic steering: Sy stem fault! You can
continue dr iving
If the indic ator ligh t turns on and the mes
sage appears, the steering may be more diffi
cu lt to move o r more sensitive tha n usual. The
steering wheel may a lso be at an ang le when
driv ing straight.
Drive slowly to your a uth orized Audi dea ler or
qualified workshop to have the ma lf u nction
corrected.
(;rij Dynamic ste ering : initializing
If this drive r message appea rs and the indica
tor light is flas hing on the instrument panel,
dynam ic steer ing* i s being rein itia lized. After
sta rting the engine, the stee ring w heel will
move s light ly . Re- initializa tion might be nec
essary if the stee ring wheel was moved hard
to the left and right whi le the vehicle was not
moving. The display goes out as soon as initi
alization is complete .
A WARNING
-Have the dy namic stee ring* system mal
f u nction repa ired as soon as possible by an
authorized Audi dealer or qualified work
shop - risk of acc ident!
-
•
•
Page 194 of 296

192 Intelligent technology
(D Tips
-If the . or 'Tj indicator light only stays
on for a short time, you may continue
driving.
- The dynamic steering* stability systems
are not available in the event of a system
malfunction.
- For additional information on dynamic
steering*, refer to
c:> page 113.
Driving with your
quattro
App lies to vehicles: with a ll-wheel drive
With all-wheel drive, all four wheels are driv
en .
General information
With all-wheel drive, power is distributed to
all four wheels . This happens automatically
depending on your driving style and the road
conditions at the time . See also
c:> page 186.
A center differential distributes the driving
power variably to the front and rear axle .
It
works together with selective wheel torque
control , which activates when driving through
curves
c:> page 187. With the sport differen
tial*, power distribution to the rear wheels is
variable and can be adjusted with drive select
c:>page 113.
The all-wheel drive concept is designed for
high engine power . Your vehicle is exception
ally powerful and has excellent driving charac
teristics both under normal driving conditions
and on snow and ice. Always read and follow
safety precautions
c:> & .
Winter tires
When driving in the winter , your vehicle with
all-wheel drive has an advantage, even with regular tires. In winter road conditions it may
be advisable to mount winter tires (or all-sea
son tires) for improved driveability and brak
ing: these tires must be mounted on
all four
wheels .
See also c:> page 246, Winter tires .
Tire chains
Where tire chains are mandatory on certain
roads, this normally also applies to vehicles
with all-wheel drive
c:> page 247, Snow
chains.
Replacing wheels/tires
Vehicles with all-wheel drive must always have tires of the same size. Also avoid tires
with different tread depths. For details see
page
c:> page 242, New tires and replacing
tires and wheels.
Off-Road driving?
Your Audi does not have enough ground clear
ance to be used as an off-road vehicle.
It is
therefore best to avoid rough tracks and un even terrain as much as possible. Also refer to
c:> page 195.
A WARNING
-
Always adjust your driving to road and traf-
fic conditions. Do not let the extra safety
afforded by all-wheel drive tempt you into
taking extra risks.
- Although the all-wheel drive is very ef
fective, always remember that braking
capacity is limited by tire traction . You
should therefore not drive at excessive
speeds on icy or slippery road surfaces.
- On wet road surfaces, be careful not to
drive too fast because the front wheels
could begin to slide on top of the water
(aquaplaning). If this should occur, you
will have no warning from a sudden in crease in engine speed as with a front
wheel drive vehicle. Always drive at
speeds which are suited to the road con
ditions -risk of crash.
Page 195 of 296

Energy management
Starting ability is optimized
Energy management controls the distribution
of electrical energy and thus optimizes the
availability of electrical energy for starting the engine .
If a vehicle with a conventional energy system
is not driven for a long period of time , the bat
tery is discharged by idling current consumers
(e.g. immobilizer). In ce rtain c ircumstances it
can result in there being insuff icient ene rgy
avai lab le to start the engine .
Intell igent energy management in your vehi
cle hand les the d istribution of electrical ener
gy. Starting ab il ity is markedly improved and
the life of the battery is extended.
Basically, energy management consists of
batt ery di agno sis, idlin g current man ag e
m ent
and dyn ami c en ergy m anage ment .
Batter y diagnosis
Battery diagnosis continuously determines
the state of the battery . Sensors determ ine
battery vo ltage, battery current and battery
temperature. This dete rm ines the current
state of charge and the powe r of the battery.
Idling curr ent man agement
Idling current management reduces ene rgy
consumption while the vehicle is stand ing .
W ith the ignition switched off, it cont ro ls the
energy supply to the va rious electr ical compo
nents . Data from battery diagnosis is consid
ered.
Depending on the battery's state of charge,
i nd ividua l consumers are gradual ly t urned off
to prevent excess ive d ischarge of the bat tery
and thus maintain starting capability .
Dynamic en ergy management
While the vehicle is being driven, dynamic en
e rgy management dist ributes the energy gen
e rated according to the needs of the individu
a l components.
It reg ulates cons umption, so
that more electrical energy is not being used
Int ellig ent technolog y 193
than is being generated and ensures an opti
mal state of charge for the battery.
(0 Tips
- But even energy management canno t
negate the limits of physics . Consider
that the power and life of a battery are
limited .
- If starting ability is threatened, the indi
cator light (•)
;:i ppears ~ page 17.
What you should know
The highest priority is given to maintaining
starting capability.
T he bat tery is severe ly taxed in short-distance
driving, in city traffic and during the cold time
of year. Ab undant electrical energy is re
quired, but on ly a little is generated .
It is also
critica l if the engine is not running and electri
ca l components are turned on . In this in
stance energy is be ing consumed but none is
being generated .
It is in precisely these situations that you will
notice energy management active ly regulat
ing the d istribution of energy.
V ehicle stand s for an ex tend ed peri od
If you do not drive your vehicle over a period
of severa l days or weeks, e lectrica l compo
nents are gradually cut back or switched off.
This reduces energy consumption and ma in
ta ins start ing capability over a longer period .
Some of the convenience functions may not
operate, such as the interior l ights or the
power seat adjustme nt. The convenience
funct ions w ill be available again when you
swi tch on the ignition and sta rt the eng ine .
With the eng in e turn ed off
If you listen to the radio, for example, w ith
the engine tu rned off or use other MMI func
tions, the battery is be ing d ischarged.
If starting capability is jeopardized due to en
ergy consumption, the following warning ap- pears in the MM I display: ..,.
•
•
Page 196 of 296

194 Intelligent technology
Plea se start the engin e soon or th e system
w ill be tu rned off.
The warning ind icates that the system will be
turned off automa tic ally after 3 m inu tes. If
you wish to continue using the functions , you
have to start the engine .
With the engine running
Although electrical e nergy is generated when
the vehicle is be ing driven , the battery can be
come d ischarged. This happens most ly when
little energy is being generated and a great
deal consumed and the battery 's state of
charge is not optimal.
To br ing the energy balance back into equili
brium, consumers which require especia lly
large amounts of energy are temporarily c ut
back or switched off. Heating systems in par·
ticular requ ire a great deal of energy. If you
notice, for example, that the heated seats* or
the heated rear window are not heating, they have been temporar ily cut back or switched
off. These systems will be ava ilable again as
soon as the energy ba lance has been restored.
You will also notice that engine idle speed has been increased slightly . This is norma l and not
a cause fo r concern . By increas ing engine idle
speed the add itiona l ene rgy required is gener
ated and the batte ry is charged.
Page 199 of 296

-Have your vehicle maintained properly
and in accordance with the service rec
ommendations in your Warranty
&
Maintenance booklet.
- Lack of proper maintenance as well as
improper use of the vehicle will impair
the function of the emission control
system and could lead to damage.
@ For the sake of the environment
Even when the Emission Control System is
operating properly, the exhaust gas can
have a sulfur-like exhaust gas smell under
some operating states. This depends on
the sulfur content of the fuel being used .
Using a different brand of fuel may help,
or filling the tank with lead-free super
grade gaso line.
Shutting down vehicle
If you wou ld like your veh icle to remain inop
erat ive for a longer period of time, contact an
Aud i or other specialized dealer. They can ad
vise you on necessary precautions e .g. corro
sion prevention, maintenance and storage. Pay attention to add itional information con
cerning the battery. Refer to¢
page 225.
Operate your vehicle
economically and
minimize pollution
General
Your personal style of driving will determine
the economy of your vehicle , as well as ex
haust and noise levels .
Fuel economy, environmental impact, and
wear on your engine, brakes and tires largely
depend on three factors:
- your persona l driving style
- operating conditions
- technical limitat ions
If you anticipate what you need to do next and
drive economically, you can easily cut your
f u el cons umption by 10-15 percent. This sec-
Driving and environment 197
tion wi ll give you some tips on how you can
help the environment and your pocketbook .
(0 Tips
The consumption estimates as published
by ENVIRONMENTAL PROTECTION AGENCY
(EPA) and Transport Canada may not corre
spond to your actual consumption on the
road, which will vary depending upon vehi
cle load and speed, road and weather con
ditions, trip length, etc.
Drive smoothly and keep a lookout
ahead
Vehicles use the most fuel when they are ac
celerating .
.,. Avo id unnecessary accelerating and brak ing.
Vehicles use the most fue l when they are ac
ce lerat ing. If you ant icipate what is going to
happen next, you will need to brake less and,
thus, accelerate less . Let the vehicle coast
whenever possible -for example when you see
that the next traff ic light is red.
Avoid full throttle
Driving at moderate speeds saves fuel and
improves your mileage .
.,. Try and keep well below your car's maximum
speed.
Acce lerat ing gently red uces fue l cons ump
tion, eng ine wear, and does not disturb the
environment .
Fuel consumption, exhaust emiss ions and en
gine noise increase disproportionately at high
speeds. If you drive at approximately three quarters of top speed, fuel consumption w ill
be reduced by one half. Never drive faster
than the posted speed l imit and weather con
ditions permi t.
•
•
Page 200 of 296

198 Driving and en vironm ent
Reducing unnecessary idling
Even when your car is just idling it burns up
fuel .
.,. Shut the engine off when you are not dr iving
the vehicle.
.,. Do not warm up the vehicle by letting the
engine run at idle .
It makes sense to shut
off the engine in traffic
jams, when waiting for trains to pass at ra il
road crossings, or at traff ic lights that have
l ong wa its on red . Turning the engine
off fo r
just 30-40 seconds saves more fue l than is
burned s tarti ng the eng ine again .
It takes a long time for the engine to warm up
fu lly when it is running at idle . Howeve r, wear
and nox ious em issions are especially high
when the engine is warming up. So you should
drive away as soon as you start the engine and
avoid running at high rpms while the engine is
still warming up .
(D Note
Do not leave engine idling unattended af
ter starting . If warning lights shou ld come
on to indicate improper operation, they
wou ld go unheeded. Extended idling also
produces heat, which cou ld result in over
heating or other damage to the vehicle or
other property .
Regular maintenance
A badly tuned engine unnecessarily wastes a
lot of fuel .
... Have your vehicle serviced at regular inter-
vals.
By having your vehicle regularly serviced by an
authorized Audi dealer he lps to ensure that it
runs properly and economically . The condition
of your vehicle not only affects its safety and
ab ility to hold its value, it also affects
fuel
consumpt ion .
Check you r oil ea ch time you fill you r tank.
The amount o f oi l used is re lated to engine
load and speed.
It i s normal fo r the oil consump tion of a new
engine to reach its lowest value after a certa in
mileage has been d riven.
You must drive your veh icle about 3,000 m iles
(S,000 kilometers) before you can properly
assess oil consumpt ion.
T his also app lies to fue l consumption and en
gine o utput.
(D Note
- Have your veh icle ma inta ined properly
and in acco rdance with the service rec
ommendations in your Wa rranty
& Main
t enance boo klet . Lack of p roper ma inte
nance as well as improper use of the ve
hicle will impair the function of the
emission contro l system and cou ld lead
to damage.
- Do not alter or remove any component of
the Emission Control System unless ap
proved by the manufacturer.
-Do not alter or remove any device, such
as heat sh ie lds, switches, ign it ion w ires,
valves, which are designed to protect
your vehicle's Emission Control System and other important vehicle compo
nents.
Fewer short trips
Fuel consumption will always be relatively
high on short trips .
.,. Try to avoid dr iv ing short distances w ith a
cold engine .
T he engine and cata lytic converter have to
reach their opt imal
operat ing temperature to
reduce fuel consumpt ion and nox ious emis
s ions effectively .
Just after starting, a co ld eng ine in a mid-s ize
car only achieves a fuel economy of 6-8 m iles
per gallon (30-40 l/100 km). After about a
half a mile, fuel economy cl imbs to 12 mpg
(20 l/100 km) . After about
2 .5 miles (4 km), ll>
Page 201 of 296

the engine is at its proper operating tempera
ture and fuel economy has reached a normal
level. So you can see that you should avoid
short trips whenever possib le.
The
outside temperature is also critical in this
regard. Your car consumes more fuel in the
winter than in the summer .
allroad: Driving offroad
General information
Applies to vehicles: atlroad
When driving offroad, the funct ions for the
e lectronic stab ilization control (ESC) are ex
panded. The ESC-Offroad-Mode can be activat
ed in driving situations in which a wheel lock
or a differentia l lock function is needed
c::> page 188. In addit ion, your Audi provides
continuous all wheel drive .
Your Audi is however , not an offroad vehicle.
Never drive the vehicle in terrain which is not
suitable for the vehicle, or which exceeds
your driving skills. Never take any unneces
sary risks!
After driving offroad
-After driving offroad, remove branches and
other debris from the radiator grille, under
body, and wheels. Look especially for objects
(stones) that have been caught in the tire
tread .
- Clean the body and the vehicle underbody
and inspect the vehicle for possible damag
es.
- Clean off the dirty windows, headlights, tail
lights and the license plate.
- Perform a brake test (especially after driving through water).
A WARNING
- Be espec ially aware and attentive when
dr iv ing under diff icult conditions . Dam
ages to the vehicle and injuries may oc
cur when driving at an excess ively high
speed or with incorrect driving maneu
vers.
Driving and environment 199
- Always adjust your speed and handling
to the roads, terrain, traff ic and weather
conditions. Drive especially slow if off road with low visibility.
- Please note that the wheels can spin and
the vehicle can break away when the ESC
Offroad Mode is switched off, especially
when the road is slippery .
- Driving stability is reduced in the ESC
Offroad mode .
® For the sake of the environment
Avoid harming the environment and take
nature into cons ideration.
(D Tips
Only drive where it is allowed and always
stay on the provided roads and paths.
Driver messages
Applies to vehicles : a ll road
There is only one right way to drive in difficult
conditions: slowly and with caution!
When dr iving offroad, observe the following:
... Never drive the vehicle i n terrain which is
not suitab le for the vehicle, or which ex
ceeds your driv ing ski lls. Never take any un
necessary risks!
... Drive slow ly and cautiously!
... Pay attention to the
ground clearance of
your vehicle! This may vary depending on the load and composition of the ground and
the environment. The driver is therefore re
sponsible for deciding whether a veh icle can
handle a specific situation.
... Act ivate the
ESC -Offroad-Mode c::> page 188
as needed.
Difficult terrain
Never dr ive in areas that are not familiar to
you and drive slowly when offroad and be pre
pared and expect the unexpected (e.g. pot
holes, boulders, tree stumps, etc.)
To prevent the vehicle from bottoming and avo id damage to the underbody, you should
drive straight across severe bumps in the
IJII>
•
•