transmission AUDI R8 SPYDER 2015 Owners Manual

..... N
r-­N "': ..... \!) Ll'I
N Ll'I .....
(!) Adjuster control for outside mirrors .. .. .............. ... .
@ Door handle
@ Power locking switch
© Switches for:
- Front lid release ........... . .
- Fuel filler flap release ... .. .. .
® A ir outlets ............ .... .. .
® Light switch ........... .... .. .
(J) Turn signal and high beam . .. . . .
@ Multifunction steering wheel with :
- Horn
- Driver's airbag ....... .. .. .. .
- Audio, telephone and voice con-
trol system operating buttons
® Instrument cluster
@ Switches for:
- Windshield wiper/washer
- Trip computer ........ .. .. .. .
- Menu display .............. .
- Lap Timer ........... .. .. .. .
- Speed warning system ... .. .. .
@ Steering lock/ignition/starter
switch (in the steering wheel col- umn) .. . .... ............. .. .
@ Adjustable steer ing column .. .. .
@ Cruise control ............... .
(§ Instrument lighting .... .. .. .. .
@ Data Link Connector (DLC) for On
Board Diagnostics (OBD II) ... .. .
49
31
32
153
63
46
47
106
8
51
21
22
25
69
66
66
71
49
26
@ Power window switches
@
@
@
@
@
@ Navigation system
Glove compartment (lockable)
Front passenger's airbag ...... .
Rear window defogger switch ...
Climate controls .. .......... . .
Gear shift lever or selector lever (S
tronic):
- Manual transmission
- S tronic ..... .............. .
@) Switches for:
- Audi magnetic ride
- E lectronic Stabilization Control
- Emergency flasher .......... .
- Retractable rear spoiler ...... .
- Parking system ............ . .
@ Convertible top switch ........ .
@
@ Rear window switch
Parking brake lever
(D Tips
Cockpit
34
60
106
64
61
75
72
134 48
138
80
38
40
68
- Some of the equipment or features shown
in the general illustration may be standard
equipment on your vehicle or my be option­
al equipment depending on your mode l.
- A separate brochure is p rovided for your fac­
tory-installed audio system and/or the Audi
Navigation System.
7

.... N
l'­
N "1: .... I.O
"' N
"' ....
_& WARNING
When working in the engine compartment:
- Turn the engine off .
- Activate the parking brake.
- In vehicles with a manual transmission,
move the shifter lever into idle. In vehicles
with the R tronic transmission, move these­
lector lever into the N position.
- Remove the ignition key.
- Let the engine cool down.
- Keep children away from the engine com-
partment .
0 Note
To prevent damage to the vehicle, only open
the convertible top storage bay lid when the
engine compartment lid is closed.
Step 3: Remove the covers
Fig. 44 Convertible top: covers marked
. '
®Ir
! N .., a,
Fig. 45 Convertible top sto rage bay l id : removing the cover
The following steps must be performed on both
sides of the vehicle.
.,. Remove the bolt in the cover on the bottom
side of the storage bay lid using the open end
wrench from the vehicle tool kit@ c::>
fig. 45 .
Convertible top
.,. Move the cover up and down carefully until it
can be pulled downward from the teeth @.
Step 4: Lift the convertible top out
Fig. 46 Convertible top s torage bay: lifting the conver tible
top out
Fig. 47 W inds hield fra me: pressing the co nve rtible top for­
ward
.,. Hold the convertible top at the @ point (arrow)
c::>
fig. 46 and raise it carefully c::> &, .
.,. Pull the convertible top all the way out in the
direction indicated @. Position the fins upward
at the same time .
.,. Press the convertible top as far forward toward
the windshield frame as possible c::>
fig. 47.
Have a second person assist when positioning the
convertible top. That person should stand on the
opposite side of the vehicle and perform the
same steps.
_& WARNING
-- When positioning the convertible top, avoid
contact with the supports or other moving
parts. Otherwise you could pinch your
hands.
- When pressing the convertible top down on­
to the windshield frame, make sure that you
do not pinch yourself or anyone else.
43

..... N
r-­N "': ..... \!) ..,.,
N ..,., .....
A WARNING
-=
Always release t he parkin g brake completely.
A part ially engaged brake will over heat th e
rear brakes, reduce their effect iveness and
cause excess ive wear. This could lead to brake
fai lure and an accident.
([) Note
Only after the ve hicle has come to complete
stop, sho uld you firmly set the parking brake
and move the gearshift lever into a gear.
Parking
Parking
~ Stop t he vehicle using the brake pedal.
~ Set the parking b ra ke firmly.
~ Swi tch off the engine.
~ Move t he se lecto r lever into the P pos ition ( au­
tomatic t ransmis sion )
or move the gearshift
lever into 1st . gear
(manual transmission )
c:>.&_ .
~ When on incl ines or declines, turn the steering
whee l so that t he vehicle w ill roll into the curb
if it beg ins to move .
A WARNING
This is how yo u can reduce the risk of in jury
w hen leav ing you r vehicle.
-
- Never park the vehicle whe re it ca n come i n
co ntact wi th dry g rass, spilled fuel or a ny
other flammable mater ials.
- Never allow anyone - especially small chi l­
dre n -to remai n in t he vehicle when it is
locked. Locke d doors ma ke i t mo re d iff icult
for rescuers to access the passenger com­
partment in the event of an emergency .
Dange r to life!
- Never leave c hildren unsupervised in the ve ­
hicle. C hildren cou ld re lease the par king
brake or move the gearshift lever out of
gear. The vehicle could sta rt to roll away and
cause an accident .
- No matter what the season is, the tempera­
ture in a parked veh icle can reach dangerous
levels.
On th e road
Starting on hills
Applies to vehicles: wit h hill ho ld assist
Hill ho ld assist makes it eas ier to sta rt on hills.
The system is activated when the brake peda l is
depressed
for a few seconds .
After releasing the brake pedal, the b rake power
is he ld for a
brief moment to prevent the vehicle
from rol ling back when starting . At this time, you
can eas ily beg in to move your vehicle.
A WARNING
- I f you did not begin moving imme diate ly af­
ter re leasi ng the b ra ke peda l, unde r ce rtain
cir cumstan ces, the vehicle w ould beg in to
roll bac kward. Depress t he brake pe dal im­
mediately or engage the hand brake.
- Should t he e ngine sta ll, dep ress the brake
pe dal immed iately or enga ge the hand
b rake.
- I n or der to preven t the vehicle from roll ing
back unintentionally when s tarting in s top ­
and-go traffic, keep the brake pe dal de­
pressed for a few seconds before driving off.
(D Tips
You can find o ut if yo ur vehicle is eq uipped
wi th "Hill hold ass ist" at an autho riz ed Au di
d ealersh ip.
Speed warning system
Speed warning system
The speed warning system helps you to keep your
driving speed below a set speed limit .
The speed warn ing system warns the driver if he
exceeds a previously stored max imum speed. A
warning tone will sound as soon as the veh icle
speed exceeds the set speed by about
3 mph
(3 km/h) . At the same t ime, a warning symbo l
appea rs i n the display .
The speed warn ing system has
two warn ing
thre sholds
tha t function independe ntly of each
othe r and t hat have somewhat d iffe rent pu rpos­
es:
69

On the road
@ Tips
-Vehicles with manua l transmission: You can
attain the set speed only if the currently en­
gaged gear a llows it and the engine is not
stressed. Shifting to a h igher or lower gear
promptly will allow the engine to run
smoothly.
- The cruise control cannot maintain a con­
stant speed when driving downhill. The ve­
hicle will accelerate under its own weight .
Downshift to a lower gea r or use the brakes
to slow down.
Changing speed
.. Press lever in the 0 or O direction¢ page 71,
fig .
Bl to increase or decrease your speed .
.. Re lease the lever to save that speed .
You ca n also press the accelera tor pedal down to
increase your speed, e.g . if you want to pass
someone . The speed you saved earlier will re­
sume as soon as you release the accelerator ped­
al.
If , however, you exceed your saved speed by
S mph
(10 km/h) for longer than S minutes , the
cruise control will turn off temporarily. The sym­
bol will go out but the saved speed will be re­
tained.
Presetting your speed
You can preset your desired speed while the vehi­
cle is not moving .
.. Turn on the ignition .
.. Pull lever into position@¢
page 71 , fig . Bl .
.. Press the lever in the 0 or O direction to in-
crease or decrease your speed .
.,. Release the lever to save that speed .
This function makes it possible, for example, to
save the speed you want before driving on the
highway. Once on the highway, activate the cruise
control by pulling the lever toward @.
72
Switching the system off
Temporary deactivation
.. Press the brake pedal, or
.. Keep the clutch pedal pressed down longe r, or
.,. Press the lever into position @(not clicked into
place)
¢page 71, fig. Bl, or
.. Drive for longer than 5 minutes at more than
S mph
(10 km/h) above the stored speed .
Switching off completely
.,. Press lever into position @(clicked into place),
or
.. Switch the ignition off.
The system retains the saved speed if you deacti­
vate the cruise control temporarily. To resume
the saved speed, release the brake or clutch ped­
al and pull the lever to pos ition @.
Switch ing the ignition off erases the saved speed.
.&_ WARNING
You should only return to the saved speed if it
is not too fast for the current traffic condi­
tions -risk of an accident!
Audi magnetic ride
Damping can be adjusted to the driver's prefer­
ence and it adapts automatically to the current
driving situation .
SPORT •
Fig. 82 Center console: Sw itch for Audi magnet ic ride
.,. To turn sport setting on/off, press the sw itch
¢ fig. 82.
Audi magnetic ride is an electronically controlled damp ing system . This chassis system assists the
driver by adapting to the particular situation
liJI,

throug h im perce ptib le contro l processes . The
damping provides individua l modulation of
damping forces. For example, with damping
characterist ics set to prov ide greater comfort,
damping is set somewhat harder for a brief peri­
od only as requ ired, when round ing a curve and
when braking .
Standard setting
Select the standard sett ing if you prefer a sus ­
pension setting emphasi zing comfort.
Sport s etting
Select the sport setting if you prefe r a spor ty sus­
pension setting. The LED in the button
[l] comes
on to indicate sport setting .
@ Tips
The warning/indicato r ligh t R in the instr u­
ment cluster comes on in the event of a mal­
function. Drive to the closest a uthorized Audi
dea ler as soon as possible and have the mal­
function repaired.
Sporty driving
Warming up and cooling down
B y care fully warming up and cooling down you r
veh icle, you can he lp ensure tha t it is not over ­
stressed unnecessarily du ring sporty driving.
W hen warming up , the veh icle is driven a t a max ­
i mum eng ine speed of 6 000 R PM
(Vl O engine) or
70 00 RPM (V8 engine) in order to raise the en ­
g ine oi l tempe ratu re to a minimum of 140 °F
(60 °() . The tires also only reach the ir full road
h olding capability once they have warmed up.
The cooling fan can continue to run in you r vehi ­
cle after the engine is switched off . However,
d riving the vehicle to cool it down is part icu larly
important. During sporty driving, the engine and
brakes, the exhaust system, and the transmission
all become extremely hot . Before you park the
ve hicle, you should dr ive it for a few m iles/kilo-
~ mete rs a t light load in the low rpm range to al-
~ low i t to cool down. "': ,...., \!) 1.1'1
N 1.1'1 ,....,
On th e road
Driving on a track
Befo re you take your veh icle o ut on a track, en­
s u re th at i t is in perfe ct condi tion. Fo r ex ample ,
yo u should chec k the tire trea d an d the bra ke
pads . It is bes t to inc rease tire pressu re by about
0 .3 bar.
W hen dr iving on a track , oil consump tion may be
somewhat higher than in "norma l" ope rat ion
¢ page 159 .
You should definitely inspec t your ve hicle afte r
s u bje cting it to seve re condi tions. Are the br ake
pads OK? Is there any thing unusua l about the
t ir es, including the inner and outer sidewalls (e .g.
tread , blistering)? A re the air intakes free of
l eaves and tire dust? Is the o il level OK?
Your a uth orized Audi dea ler or q ua lified wor k­
sho p will be happy to underta ke an inspection be ­
fore and after use on the race track .
A WARNING ._
Some race tracks (e.g. steeply banked turns)
may affect the response of t he ESC.
(D Tips
- Review the t rack requ irements and condi ­
tions befo re you sta rt driv ing.
- W hen d riven on a race track, all vehicle
parts are severe ly stressed. This can result
in increased wear .
73

Transmission
Transmission Manual transmission
Gearshift lever
Applies to vehicles: with manua l transmission
The clutch pedal must be depressed all the way
before you can start the engine .
The manual transmission in your Audi is equipped
with an
interlock-feature.
• Depress the clutch pedal all the way.
• Start the engine with the gearshift lever in Neu­
tral and the clutch pedal depressed.
(D Note
Always depress the clutch pedal fully when
changing gears. Do not hold the vehicle on a
hill with the clutch pedal partially depressed.
This may cause premature clutch wear or
damage.
(D Tips
- Resting your hand on the gearshift lever
knob while driving will cause premature
wear in the transmission.
- The back-up lights go on when you shift into
Reverse with the ignition on.
Gearshift pattern (6-speed manual
transmission)
App lies to vehicles: with 6-speed manual transmission
Fig. 83 Gearshift pattern: 6-speed manual transm iss ion
Drive in 6th gear for optimum fuel economy
when cruising. However, if more acceleration is
required (when passing, for examp le), sh ift
down.
74
Engaging reverse gear (R)
• Move the shift lever all the way to the left,
press it down, then push it backward.
Especially after driving forward, stop the vehicle
completely, shift into
Neutral and rest the shift
l ever briefly in Neutral before shifting into
Re­
verse.
Launch Control Program
Applies to vehicles : wit h VlO engin e and manual t ra nsmissio n
The Launch Control Program enables maximum
acceleration.
Requirement: The engine must be at operat ing
temperature and the steering wheel must not be
turned.
• With the engine running, press the button
l:fil
one time. The ESC indicator light II in the
Dr iver Informat ion System display illum inat es
and the message
ESC sport -Warning! Re­
stricted stability appears .
• Press the clutch and hold it down.
• Engage the first gear.
• Press the accelerator pedal all the way down
until the engine speed remains steady at 6500
RPM .
• Release the clutch carefully~,&. .
A WARNING
- Always adapt your driving to the traffic flow.
- Only use Launch Control when road and traf-
fic conditions allow it and other drivers will
not be endange red or annoyed by your driv­
ing and the vehicle's acceleration .
- Please note that the driving wheels can spin
and the vehicle can break away when ESC is
sw itched off, especially when the road is
slippery .
- Once you have accelerated, you should
switch the ESC back on by pressing the but­
ton
00 .
(D Tips
- When accelerating using the Launch Control
program, all vehicle parts are subject to .,..

.... N
l'­
N "1: .... I.O
"' N
"' ....
heavy loads. This can result in increased
wear .
- The Launch Control Program only funct ions
when the parking brake is released and the
vehicle speed is less than 3 mph (5 km/h).
S tronic
Description
Applies to vehicles: with S tronic
Fig. 84 Shift pattern
Fig. 85 Display : selected gea rs
Your vehicle is equipped with an electronically­
controlled manual transmission called S tronic .
Two independent clutches transfer the power be­
tween the eng ine and transmission. They replace
the torque converter used in conventional auto­
mat ic transmissions and allow the vehicle to ac­
celerate without a noticeable interruption in trac­
tion .
The selected mode of operation, the gear engag­ ed and the sport function are shown in the Dr iver
Information System display ¢
fig. 85.
M -Manual operation
In this operating mode, you shift the forward
gears using the selector lever
r=>v page 76 or the
Transmission
shift paddles on the multifunction steering wheel
¢ page 78.
A - Automatic operation
In this operating mode, the forward gears are
shifted up or down depending on engine load and
vehicle speed
¢ page 77.
R- Reverse
Only s hift into reverse gear when the vehicle is
stationary and the engine is runn ing at idle
speed ¢
Li')...
To engage reverse gear, you have to press the
brake pedal, move the selector lever to the right
and t ip it towards
R. In reverse gear, the backup
lights illuminate when the ignition is on .
N -Neutral
To engage neutral, you have to move the selector
lever to the left or to the right . If reverse gear is
engaged,
move the selector lever to the left . If a
forward gea r is engaged, move the selector lever
to the right.
Sport function
The sport function is switched on by pressing the
I SPORT ! button on the selector lever cover . Up ­
shifting at a higher RPM makes full use of the en­
gine's power . Shift time is decreased and acceler­
ator pedal response is improved . In addition, in
manua l operation the engine does
not shift au to­
matically into the next gear before it has reached
the maximum permissible engine speed. In auto ­
matic operation, upshifting continues automati­
cally.
P -Automatic parking lock
The automatic parking lock is engaged immedi­
ately after you remove the key. The automatic
parking lock is also engaged if you turn off the
engine while in the A, R, or manual mode posi­
tions .
If you turn off the engine while in the N position
and leave the vehicle key in the ignition, the
transmission remains in the N position for ap­ proximately 20 minutes and then activates the
automatic parking lock . If vehicle movement is
detected within that 20 minutes based on
IIJI.
75

Transmission
-When acce le rat ing using the Launch Cont ro l
program, all vehicle pa rts are subject to
heavy loads. T his can result in increased
wear.
Steering wheel with shift paddles
App lies to veh icles: with S tron ic
The shift paddles allow you to select gears man­
ually on the steering wheel.
F ig . 8 6 Steer ing w heel: shi ft padd les
• To downshift, press t he paddle on the left 0 -
• To upsh ift, p ress the padd le on the right G) .
You ca n continue to use the manual s hift pro ­
g ram with the se lector lever in the cente r con­
sole.
Transmission malfunction
Applies to vehicles : with S tro nic
l'§J Transmis sion : please press the brake pedal
and select the position again
Press th e brake pedal a nd se lect the desi red se­
lec to r l eve r pos it io n aga in. Yo u can then continue
d riving.
[O] Transmission too hot: please modify driving
style
The transmission temperature has increased sig­ n ificant ly due to the spo rty dr iv ing man ner . Drive
i n a less sporty manner u nti l t h e temperature re­
t ur ns to the normal rang e and the indicator light
sw itches of.
[i1 Transmi ssion : System malfunction! You may
continue driving
There is a system ma lfunction in the transmis­
sion . You may continue driving. Drive to your au-
78
thorized Audi dea ler or q ua lif ied repa ir facility
soon to have the malfunction corrected .
[o.Jij Transmission: Sy stem malfunction ! You
may continue driving in A until you turn the en ­
gine off .
There is a system malfunc tion i n the trans mis­
s io n. The tran sm iss ion i s swi tchi ng to eme rgency
mode. Drive to your author ized A udi dealer or
q ualified repair facili ty imme diate ly to have the
malfunction corrected.
l'§J Transmission : System malfunction ! Driving
ability is restricted
There is a system malfunct ion in the t ransmis­
s io n. The t ransm iss ion is swit ching to eme rgency
m ode. Thi s mo de onl y shifts in to ce rtain ge ars or
will no l onger shi ft at all. The eng ine may st all.
D rive to your au thori zed A udi dealer or qualified
repair fac ility immediately to have t he malfunc­
tion corrected.
[oJ;j Transmission: System malfunction ! Driv­
ing ability is restricted. No reverse gear
There is a system malfun ction i n the trans mis­
s ion . The tran sm iss ion i s swi tchi ng t o em ergency
mode. T his mode o nly shifts in to cer tain gears or
will no longer shift at all . The eng ine may stall.
You cannot e ngage the reverse gea r. Drive to yo ur
aut ho rized Aud i dea ler or q ualified repa ir facility
i mmediately t o have the malfunct ion corrected.
[i1 Risk of rolling! P not pos sible. Please set the
parking brake
- Th e parking lo ck was re le ase d using the eme r­
gency rele ase
~ page 7 9 . O r
- Th e parking lo ck can no l onge r be engage d.
Dr ive t o your authoriz ed Audi de aler or q uali­
fie d repair f acili ty immedia tely to have the ma l­
fu nction cor rected.
• Transmission : System malfunction ! Stop
the vehicle
Do no t con tinue dr iving . Tur n off the ignition and
contact your nea rest author ized Audi d eal er for
ass ista nce.
There is a serious system malfunct ion. Continu -
i ng to dr ive could result in s ubsequent damage. .,.

.... N
l'­
N "1: .... I.O
"' N
"' ....
(D Note
If S tronic has switched to emergency opera­
tion mode, you should have the malfunction corrected as soon as possible.
Parking lock emergency release
App lies to vehicles: with S tro nic
The parking lock must be released using the
emergency release before towing the vehicle.
F ig. 87 Engine compart men t: emergency release
Fig. 88 Engine compa rtment: parking lock emergency re·
lease
The emergency release is located in the engine
compartment.
Releasing the parking lock using the
emergency release
.,. Turn the engine off .
.,. Set the parking brake to prevent the vehicle
from rolling unintentionally .
.,. Remove the removable plastic key from the lug­
gage compartment and extend the key to its
full length .
.,. Remove the cover over the emergency release
mechan ism .
Tran smission
.,. Insert the plastic key into the emergency re­
lease mechanism and turn it all the way to the
r ight ~
fig. 88.
Resetting the parking lock
.,. Turn the key all the way to the left.
.,. Install the cover.
The
[il indicator light appears in the instrument
cluster if the parking lock was released from
P
using the emergency release. The message Risk
of rolling! P not possible. Please set the parking
brake
also appears.
,&_ WARNING
- Only activate the emergency release whi le
on a level surface or a slight s lope.
- If you release the parking lock using the
emergency release, secure your vehicle with
the parking brake. The vehicle can roll away if it is not secured and cause a crash.
(D Tips
The transmission cannot detect if the parking
l ock was released with the emergency re lease.
An error message appears in the instrument
cluster as soon as the transmiss ion requires
the
P position but th is position is not engag­
ed.
79

..... N
r-­N "': ..... \!) 1.1'1
N 1.1'1 .....
This can cause a temporary reduction in braking
force compared to dry brakes. You can compen­
sate for this by pressing the brake pedal harder.
Cor ro sion
There may be a tendency for dirt to bui ld up on
the brake pads and corrosion to fo rm on the discs
if the car is not driven regularly or only for short
trips with little use of the brakes.
If the b rakes are not used frequently, or if corro­
sion has formed on the discs, it is advisab le to
clean off the pads and discs by braking firmly a
few times from a moderately high speed
c:> &. .
Faults in the brake sy stem
If you should notice a sudden increase in brake
pedal travel, then one of the two brake circuits
may have fai led
c:> .&, .
Low brak e flu id le vel
Malfunct ions can occur in the brake system if the
brake fluid level is too low. The brake flu id leve l is
monitored e lectronically.
Br ake power assis t un it
T he brake power assist unit increases the pres­
sure that you generate with the brake pedal.
It
works only when the eng ine is running .
Brak e lining wear sta tu s
Brake lining wear may be checked by visual in­
spection of the condition of the brake pads
through the openings in the wheel. If necessary,
the wheel may be removed for this inspection
c:> page 203 .
.8, WARNING
-New brake pads don't have the best stop­
ping power and must be "broken-in" during
the init ial 250 mi les ( 400 km) of normal city
driving. The break -in period can be consider­
ably longer for vehicles with ceramic brake
rotors *. You can compensate for this by
pressing the brake pedal more firmly. This
also applies later when new pads are instal­
led .
- You should perform brak ing maneuvers for
the purpose of clean ing the brake system
Int elli ge nt te chn olo gy
only if road conditions permit. Other road
users must not be put at r isk -you may
cause an accident!
- Before descending a steep grade, reduce
speed and sh ift transmission into a lower
gear or lower dr iving range. Do not ride the
brakes or hold the pedal down too long or
too often. This could cause the bra kes to get
hot and dimin ish braking effic iency .
- Do not "ride the brakes" by rest ing your foot
on the pedal when you do not intend to
brake. This may cause the brakes to over­
heat, premat ure wear and increased stop­
ping distance.
- Under certain cl imatic and operat ing condi ­
tions such as passing thro ugh water, dr iv ing
in heavy rain or after washing the vehicle,
the effectiveness of the brakes can be re­
duced . In winter, ice can accumulate on the
brake pads, lin ings, discs and drums. Care­
fully apply brakes for a test. Brakes will dry and ice coatings will be cleaned off after a
few careful brake applications.
- Driving for an extended period of t ime on
salt-covered roads without using your brakes can also affect braking efficiency .
Clean off accum ulated salt coating from
b rake discs and pads with a few cautious
brake applications.
- If you damage the front spoiler, or if you in­
stall a different spoiler, be su re the air flow
to the front brakes is not obstructed . O ther­
wise the brake system could overheat reduc­
ing the effectiveness of the entire brake sys­
tem .
- Fai lure of one brake circuit will impai r the
braking capability resu lting in an increased
stopping distance . Avoid driving the vehicle
and have it towed to the nearest Aud i dea ler
or qualif ied workshop.
- Never let the vehicle roll to a stop with the
engine shut off.
- If the brake booster is not working, for ex­
ample when towing your veh icle, or because
the brake booster has somehow been dam­
aged, the brake pedal must be pressed con ­
siderably harder to make up for the lack of booster assistance.
1 37