roll bar operation MERCEDES-BENZ SL550 2007 R230 Owner's Manual

66 Safety and SecurityOccupant safetyIn this section you will learn the most im-
portant facts about the restraint systems
of the vehicle.
The restraint systems are

Seat belts (
page 77)


Child restraints (
page 83)
Additional protection potential provided by


Supplemental Restraint System (SRS)
with

Air bags (
page 68)


Air bag control unit (with crash
sensors)


Emergency tensioning device (ETD)
for seat belts (
page 81)


Roll bar (
page 81)Air bag system components with


Front passenger front air bag off
indicator lamp (
page 76)


Front passenger seat with Occupant
Classification System (OCS)
(page 72)
Although independent systems, their pro-
tective functions work in conjunction with
each other.The SRS system conducts a self-test when
the ignition is switched on and in regular
intervals while the engine is running. This
facilitates detection of malfunctions. The
1
indicator lamp in the instrument clus-
ter comes on when the ignition is switched
on and goes out no later than a few sec-
onds after the engine has been started.
The SRS components are in operational
readiness if the
1
indicator lamp is not
lit when the engine is running.
A malfunction in the system has been
detected if the
1
indicator lamp:


fails to go out after approximately
4 seconds after the engine was started


does not come on at all


comes on after the engine was started
or while driving
i
For information on infants and children trav-
eling with you in the vehicle and restraint sys-
tems for infants and children, see “Children in
the vehicle” (
page 83).

81 Safety and Security
Occupant safety
Emergency tensioning device (ETD),
seat belt force limiter
The seat belts are equipped with emergen-
cy tensioning devices and belt force
limiters.
The ETD is designed to activate in the fol-
lowing cases:

in frontal or rear-end impacts exceed-
ing the system deployment threshold


if the restraint systems are operational
and functioning correctly, see 1 in-
dicator lamp (
page 66)


in certain vehicle rollovers if the sys-
tem determines an additional degree of
protectionWhen activated, emergency tensioning de-
vices remove slack from the belts in such a
way that the seat belts fit more snugly
against the body. Belt force limiters reduce
the force exerted by the seat belts on oc-
cupants during a crash.
Automatic comfort-fit feature seat belt
The automatic comfort-fit feature reduces
the retracting force of the seat belts when
they are in normal use.
Roll bar
i
The ETDs will only activate if the seat belts
are fastened (latch plate properly inserted into
buckle).
Warning!
G
An emergency tensioning device (ETD) that
was activated must be replaced.
When disposing of the emergency tension-
ing device, our safety instructions must be
followed. These are available at your autho-
rized Mercedes-Benz Center.
Warning!
G
This vehicle is a two occupant vehicle. The
rear storage area is not intended for use by
occupants and is not equipped for properly
seating or restraining occupants. Thus this
area should never be used by any persons.
Before operating the roll bar switch make
sure that the roll bar’s path is clear and no
persons are injured by the moving roll bar
due to inattention. Raising or lowering of the
roll bar could injure someone in it’s proximi-
ty.
For your own safety, we recommend to drive
with the roll bar raised if the outside temper-
ature is below +5°F (-15°C).!
If the outside temperature falls below +5°F
(-15°C), the roll bar must be raised manually us-
ing the buttons provided to avoid damaging the
hydraulics.

201 Controls in detail
Retractable hardtop
Retractable hardtop switch1Opening
2Closing
Engage the parking brake (
page 54).

Close the luggage cover, see “Luggage
cover” (
page 205).

Close the trunk lid.

Switch on the ignition (
page 39).Opening

Pull up on the retractable hardtop
switch as indicated by arrow 1 until
the retractable hardtop is completely
lowered into its trunk storage compart-
ment.
The multifunction display will briefly
show the message K
in operation
.
Closing

Press down on the retractable hardtop
switch as indicated by arrow 2 until
the retractable hardtop is completely
closed and locked.
The multifunction display will briefly
show the message K
in operation
.Opening/closing with the SmartKey
i
Make sure the retractable hardtop is dry be-
fore you open it. Otherwise water may enter the
trunk interior.
Warning!
G
Before operating the retractable hardtop,
make sure there is no danger of anyone
being injured by the moving parts (retract-
able roof, roof frame, and trunk lid) due to in-
attention.
Hands must never be placed near the roof
frame, upper windshield area, hardtop, shelf
behind roll bars, or trunk lid while the re-
tractable hardtop is being raised or lowered.
Serious personal injury may occur.
If potential danger exists, release the re-
spective button on the SmartKey. This im-
mediately interrupts the raising or lowering
procedure. You then can press button Œ
or ‹to raise or lower the hardtop away
from the danger zone.

367 Practical hints
What to do if …
Left display
Right display
Possible cause/consequence
Possible solution
T
Reduced
brake effect
Depress brake
pedal fully!
The electro-hydraulic brake system
is in emergency operation mode.
Considerably greater brake pedal
force is required and the stopping
distance is increased.
The maximum speed is limited to
55 mph (90 km/h).

Stop the vehicle in a safe location or as soon
as it is safe to do so.

Apply the parking brake (
page 61).

Do not drive any further.

Prevent the vehicle from rolling away by
blocking the wheels with wheel chocks or oth-
er sizable objects.

Contact an authorized Mercedes-Benz Center
or call for Roadside Assistance (
page 247).
Warning!
G
Driving while this message is displayed can
result in an accident. Have your brake sys-
tem checked immediately.
If the electro-hydraulic brake system enters
its emergency operation mode, the driver
must apply significantly greater brake pedal
pressure and depress the pedal much fur-
ther than normal to obtain braking effect.
If necessary, apply full pressure to the brake
pedal. Brakes are only applied to the front
wheels. Stopping distance is increased!
If there is a malfunction in the
electro-hydraulic brake system, we recom-
mend that the vehicle be transported with
all wheels off the ground using flatbed or ap-
propriate wheel lift/dolly equipment.
A tow bar must be used if circumstances do
not permit the use of the recommended
towing methods and the vehicle requires
towing with all four wheels on the ground.
Towing the vehicle with all four wheels on
the ground is only permissible for distances
up to 30 miles (50 km) and at a speed not to
exceed 30 mph (50 km/h). For more infor-
mation, see “Towing the vehicle”
(page 421).

368 Practical hintsWhat to do if …Left display
Right display
Possible cause/consequence
Possible solution
USA only:;Canada only:3
Reduced
brake effect
Visit
workshop
The electro-hydraulic brake system
is in emergency operation mode.
Considerably greater brake pedal
force is required and the stopping
distance is increased.

Stop the vehicle in a safe location or as soon
as it is safe to do so.

Apply the parking brake (
page 61).

Do not drive any further.

Prevent the vehicle from rolling away by
blocking the wheels with wheel chocks or oth-
er sizable objects.

Contact an authorized Mercedes-Benz Center
or call for Roadside Assistance (
page 247).
Warning!
G
Driving while this message is displayed can
result in an accident. Have your brake sys-
tem checked immediately.
If the electro-hydraulic brake system enters
its emergency operation mode, the driver
must apply significantly greater brake pedal
pressure and depress the pedal much fur-
ther than normal to obtain braking effect.
If necessary, apply full pressure to the brake
pedal. Brakes are only applied to the front
wheels. Stopping distance is increased!
If there is a malfunction in the
electro-hydraulic brake system, we recom-
mend that the vehicle be transported with
all wheels off the ground using flatbed or ap-
propriate wheel lift/dolly equipment.
A tow bar must be used if circumstances do
not permit the use of the recommended
towing methods and the vehicle requires
towing with all four wheels on the ground.
Towing the vehicle with all four wheels on
the ground is only permissible for distances
up to 30 miles (50 km) and at a speed not to
exceed 30 mph (50 km/h). For more infor-
mation, see “Towing the vehicle”
(page 421).

461 Index
Light sensor 380
Lighter see Cigarette lighter
Lighting
Instruments 136
Interior 134
Settings (control system) 159
Trunk 135
Limiting the gear range 172
Limp-Home Mode 179
Load assist 241
Lowering manually 394
Loading terminology 312
Loading the vehicle 286
Lock buttons 38
Door handle (KEYLESS-GO*) 64
Trunk (KEYLESS-GO*) 110
Locking the vehicle 60
In an emergency 393
Low beam headlamps 55, 128, 398
Replacing bulbs 400
Lowering
Load assist manually 394
Roll bar 82
Luggage compartment, rear 237Luggage cover 205
Messages in display 387
Lumbar support adjustment 121
M
Main fuse box 425, 426
Maintenance
Calling up maintenance service
indicator display 320
Clearing maintenance service indicator
message 319
Maintenance service indicator
message 319
Maintenance service term
exceeded 320
Resetting maintenance service
indicator 321
Maintenance service
When due 319
Maintenance service indicator 319
Maintenance System (U.S. vehicles) 319
Malfunction memory 152
Calling up 152
Clearing 153Manual operation
Interior lighting control 135
Locking the vehicle 393
Lowering load assist 394
Unlocking storage
compartments 392
Unlocking the driver’s door 391
Unlocking the trunk 392
Manual shift program SL 55 AMG and
SL 65 AMG 177
Massage function 122
Maximum cooling MAXCOOL 190
Maximum inflation pressure 313
Maximum load rating 313
Maximum loaded vehicle weight 313
Menus 141
AMG 146
AUDIO 149
Distronic* 151
NAV 151
Standard display 145
TEL* 165
Trip computer 163
Vehicle status message memory 152
Menus see Control system menus
Miles/kilometers in speedometer 156

464 IndexR
RACETIMER see Control system menus,
AMG menu
Radio
Operating 149
Satellite 150
Selecting station 149
Radio transmitters
Control and operation 268
Range (distance to empty)
Calling up 165
Reading lamp 33
Rear lamps see Tail lamps
Rear luggage compartment 237
Rear view mirrors see Mirrors
Recommended inflation pressure 313
Redial memory 167
Refueling 271
Regular checks 272
Regular driving style 228
Remote
Trunk opening/closing* switch 114
Remote trunk opening switch 112
Remote trunk opening/closing*
switch 113Replacing
Batteries (SmartKey) 395
High beam bulbs 400
Low beam bulbs 400
Rear lamp bulbs 398, 402
Wiper blades 403
Reset button 27
Resetting
All functions (control system) 153
Fuel consumption statistics 164
Trip odometer 137
Restraint systems 66
Emergency Tensioning Device
(ETD) 81
Messages in the multifunction
display 361
Seat belts 66, 77
Resume function
Cruise control 212
Distronic* 220
Retractable hardtop
Closing (SmartKey) 201
Closing (switch) 200
Convenience feature 201
Locking after raising/lowering 202Opening (SmartKey) 201
Opening (switch) 200
Problems when operating 203
Summer opening feature 201
Rim 313
Roll bar 81
Lowering 82
Messages in display 384
Raising 82
Warning lamp 29
Roll bar buttons 32
RON 272
Rubber parts, cleaning 328
Run Flat Indicator (Canada only) 293
S
Satellite radio 150
Seat belt force limiter 81
Seat belts 49, 66, 77
Cleaning 329
Messages in the multifunction
display 361
Warning lamp 341
Seat heating
Switching on 123
Seat ventilation* 125
Switching on 125