2019 MERCEDES-BENZ SL CLASS tow

XTo arm:lock the vehicle with the SmartKeyor KEYLESS-GO.Indicator lampCflashes. The alarm systemis armed after approximately 15 seconds.
XTo switch off:unlock the vehicle with theSmartKey or KEYLESS-GO.
A visual and audible alarm is triggered if thealarm system is armed and you open:
Ra door
Rthe vehicle with the mechanical key
Rthe trunk lid
Rthe hood
Rthe glove compartment
Rthe stowage space under the armrest
Ra stowage compartment in the rearpassenger compartment
XTo stop the alarm with the SmartKey:press the6or7button on theSmartKey.The alarm is stopped.
or
XInsert the SmartKey into the ignition lock.The alarm is stopped.
XTo stop the alarm using KEYLESS-GO:grasp the outside door handle. The Smart-Key must be outside the vehicle.The alarm is stopped.
or
XPress the Start/Stop button on the dash-board. The SmartKey must be inside thevehicle.The alarm is stopped.
The alarm is not stopped, even if you close theopen door that triggered it, for example.
If the alarm stays on for more than30 seconds, the Mercedes me connectemergency call system automatically sendsa message to the Customer Center.
This is done either by text message or dataconnection. The emergency call systemsends the message or data provided that:
Ryou have subscribed to Mercedes meconnect
Rthe Mercedes me connect service hasbeen activated properly
Rthe necessary mobile phone network isavailable
Protection against theft73
Safety
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Locking/unlocking centrally
You can start, lock or unlock the vehicle usingKEYLESS-GO. To do this, you only need carrythe SmartKey with you. You can combine thefunctions of KEYLESS-GO with those of a con-ventional SmartKey. Unlock the vehicle byusing KEYLESS-GO, for instance, and lock itusing the7button on the SmartKey.
The driver's door and the door at which thehandle is used, must both be closed. TheSmartKey must be outside the vehicle. Whenlocking or unlocking with KEYLESS-GO, thedistance between the key and the correspond-ing door handle must not be greater than 3 ft(1 m).
A check which periodically establishes a radioconnection between the vehicle and theSmartKey determines whether a valid Smart-Key is in the vehicle. This occurs, for example:
Rwhen starting the engine
Rwhile driving
Rwhen using HANDS-FREE ACCESS
Rwhen the external door handles are touched
XTo unlock the vehicle:touch the inner sur-face of the door handle.
XTo lock the vehicle:touch sensor sur-faceCorD.
Make sure that you do not touch the innersurface of the door handle.
XConvenience closing feature:touchrecessed sensor surfaceDfor an extendedperiod.
Further information on the convenienceclosing feature (Ypage 89).
Deactivating and activating
If you do not intend to use a SmartKey for anextended period of time, you can deactivatethe KEYLESS-GO function of the key. TheSmartKey will then use very little power,thereby conserving battery power. For the pur-poses of activation/deactivation, the vehiclemust not be nearby.
XTo deactivate:press the7button onthe SmartKey twice in rapid succession.The battery check lamp (Ypage 77) of theSmartKey flashes twice briefly and lights uponce, then KEYLESS-GO is deactivated.
XTo activate:press any button on the Smart-Key.
or
XInsert the SmartKey into the ignition lock.KEYLESS-GO and all of its associated fea-tures are available again.
Changing the settings of the locking
system
You can change the settings of the lockingsystem. This means only the driver's door, thelockable stowage compartments in the vehicleinterior and the fuel filler flap are unlockedwhen the vehicle is unlocked. This is useful ifyou frequently travel alone.
XTo change the setting:press and holddown the6and7buttons simultane-ously for about six seconds until the batteryindicator lamp (Ypage 77) flashes twice.
If the setting of the locking system is changedwithin the signal range of the vehicle, pressingthe7or6button:
Rlocks or
Runlocks the vehicle
The SmartKey now functions as follows:
XTo unlock:press the6button once.
XTo unlock centrally:press the6buttontwice.
XTo lock centrally:press the7button.
SmartKey75
Opening and closing
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Never leave children or animals unattended
in the vehicle.
When leaving the vehicle, always take the
SmartKey with you and lock the vehicle. This
also applies for the Digital Vehicle Key if the
"Digital Vehicle Key" function is activated via
Mercedes me connect.
Unlocking and opening doors from
the inside
!The side windows will not open/close ifthe battery is discharged or if the side win-dows have iced up. It will then not be possi-ble to close the door. Do not attempt toforce the door closed. You could otherwisedamage the door or the side window.
You can open a door from inside the vehicleeven if it has been locked.
If the vehicle has previously been locked fromthe outside, opening a door from the insidewill trigger the anti-theft alarm system. Switchoff the alarm (Ypage 72).
XPull door handleD.If the door is locked, locking knobCpopsup. The door is unlocked and can beopened.
When a door is opened, the side window onthat side opens slightly. When the door isclosed, the side window closes again.
Centrally locking and unlocking the
vehicle from the inside
You can centrally lock or unlock the vehiclefrom the inside. For example, you can unlock
the front-passenger door from the inside orlock the vehicle before you pull away.
XTo unlock:press buttonC.
XTo lock:press buttonD.If the front-passenger door is closed, thevehicle locks.
The central locking button does not lock orunlock the fuel filler flap or the stowage com-partments, such as the glove box.
You cannot unlock the vehicle centrally fromthe inside if the vehicle has been locked withthe SmartKey or KEYLESS-GO.
You can open a door from inside the vehicleeven if it has been locked.
If a locked door is opened from the inside, theprevious unlock status of the vehicle will betaken into consideration if:
Rthe vehicle was locked using the lockingbutton for the central locking, or
Rif the vehicle was locked automatically
The vehicle will be fully unlocked if it had pre-viously been fully unlocked. If only the driver'sdoor had been previously unlocked, only thedoor which has been opened from the inside isunlocked.
80Doors
Opening and closing

Automatic locking feature
XTo deactivate:press and hold buttonCforabout five seconds until a tone sounds.
XTo activate:press and hold buttonDforabout five seconds until a tone sounds.
If you press one of the two buttons and do nothear a tone, the relevant setting has alreadybeen selected.
The vehicle is locked automatically when theignition is switched on and the wheels areturning.
You could therefore lock yourself out if:
Rthe vehicle is being pushed.
Rthe vehicle is being towed.
Rthe vehicle is on a roller dynamometer.
You can also switch the automatic lockingfunction on and off using the on-board com-puter (Ypage 201).
Power closing
Power closing pulls the doors and trunk lidinto their locks automatically even if they areonly partly closed.
XPower closing feature (doors):push thedoor past the first detent position into thelock.Power closing will pull the door fully closed.
XTo power close the trunk lid:lightly pushthe trunk lid closed.The power closing function pulls the trunklid closed.
Unlocking/locking the driver's door
using the mechanical key
iIf you want to centrally lock the vehicleusing the mechanical key, begin by pressingthe locking button for the interior lockingmechanism while the driver's door is open.Then lock the driver's door using themechanical key.
XTo unlock:turn the mechanical key coun-ter-clockwise as far as it will go to positionG.
XTo lock:turn the mechanical key clockwiseas far as it will go to positionG.
If you use the mechanical key to unlock andopen the driver's door, the anti-theft alarmsystem will be triggered. Switch off the alarm(Ypage 72).
Trunk
Important safety notes
GWARNING
If objects, luggage or loads are not secured
or not secured sufficiently, they could slip,
tip over or be flung around and thereby hit
vehicle occupants. There is a risk of injury,
particularly in the event of sudden braking
or a sudden change in direction.
Always store objects so that they cannot be
flung around. Secure objects, luggage or
loads against slipping or tipping before the
journey.
!The trunk lid swings upwards whenopened. Therefore, make sure that there issufficient clearance above the trunk lid.
Trunk81
Opening and closing
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Problems with the side windows
GWARNING
If you close a side window again immediately after it has been blocked or reset, the side win-
dow closes with increased or maximum force. The reversing feature is then not active. Parts of
the body could be trapped in the closing area in the process. This poses an increased risk of
injury or even fatal injury.
Make sure that no parts of the body are in the closing area. To stop the closing process,
release the switch or push the switch again to reopen the side window.
ProblemPossible causes/consequences andPPSolutions
A side window cannotbe closed because it isblocked by objects, e.g.leaves in the windowguide.
XRemove the objects.
XClose the side window.
A side window cannotbe closed and you can-not see the cause.
If a side window is obstructed during closing and reopens againslightly:
XImmediately after the window blocks, pull the correspondingswitch again until the side window has closed.The side window is closed with increased force.
If a side window is obstructed again during closing and reopensagain slightly:
XImmediately after the window blocks, pull the correspondingswitch again until the side window has closed.The side window is closed without the automatic reversing fea-ture.
The side windows can-not be opened or closedusing the convenienceopening/closing fea-ture.
The SmartKey battery is discharged or nearly discharged.
XCheck the SmartKey battery (Ypage 77) and replace it if neces-sary (Ypage 77).
Roof
Important safety notes
GWARNING
If you do not fully open/close the soft top,
the soft-top hydraulics depressurize after a
short time. This causes the soft top to lower
unexpectedly and may cause you or others
to be trapped. There is a risk of injury.
Always open or close the soft top com-
pletely.
GWARNING
Closing the roof manually is a complicated
and technically demanding procedure, which
requires a lot of strength. You or others can
become trapped. There is a risk of injury.
Only have the soft top closed manually at a
qualified specialist workshop.
!Never sit on the rear compartment trim orstow heavy objects there. You will otherwisedamage the roof and rear compartment trimof the vehicle.
90Roof
Opening and closing

seat belt guide. This makes it easier to movethe seats forward.
Before you drive off, the seat belt must beinserted into the seat belt guide.
Observe the safety guidelines for seat belts(Ypage 42).
XTo remove:open up magnetic headDandfold the tab up in the direction of the arrow.
XTake the seat belt out of seat belt guideC.
XTo insert:fold the tab up in the direction ofthe arrow.
XInsert the seat belt back into the seat beltguide and fold the tab back down.
Adjusting the head restraints
GWARNING
You could lose control of your vehicle if you
do the following while driving:
Radjust the driver's seat, head restraint,
steering wheel or mirrors
Rfasten the seat belt
There is a risk of an accident.
Adjust the driver's seat, head restraint,
steering wheel and mirror and fasten your
seat belt before starting the engine.
XTo adjust the head restraint height:slidethe switch for the head restraint adjust-mentCup or down in the direction of thearrow.
Moving the seats forward/back
GWARNING
When you adjust a seat, you or other vehicle
occupants could become trapped, e.g. on
the seat guide rail. There is a risk of injury.
When adjusting a seat, make sure that no
one has any body parts in the sweep of the
seat.
!Make sure that there are no containers inthe cup holder and no objects in the foot-well or behind the seats when adjusting theseats. Otherwise, you could damage theseats and the objects.
You can move the seat forwards in order togain better access to the rear compartment,e.g. to reach the stowage compartment in therear passenger compartment .
XRemove the seat belt from the seat beltguide (Ypage 99).
XTo move the seat forwards:pressdonswitchC.The seat moves automatically to the fore-most position.
XTo move the seat backwards:presscon switchC.The seat moves back to the previous posi-tion.
XTo stop seat movement:pressdorcin the opposite direction.
Adjusting the multicontour seat
You can adjust the multicontour seat usingCOMAND (see Digital Operator's Manual).
Adjusting the active multicontour
seat
The active multicontour seat can be adjustedusing COMAND (see the Digital Operator'sManual).
Adjusting the 4-way lumbar support
You can adjust the 4-way lumbar supportusing COMAND (see the Digital Operator'sManual).
100Seats
Seats, steering wheel and mirrors

ProblemPossible causes/consequences andPPSolutions
The engine is not run-ning smoothly and ismisfiring.
There is a malfunction in the engine electronics or in a mechanicalcomponent of the engine management system.
XOnly depress the accelerator pedal slightly.Otherwise, non-combusted fuel may get into the catalytic con-verter and damage it.
XHave the cause rectified immediately at a qualified specialistworkshop.
The coolant tempera-ture display shows avalue above 248 ‡(120 †). The coolantwarning lamp may alsobe on and a warningtone may sound.
The coolant level is too low. The coolant is too hot and the engine isno longer being cooled sufficiently.
XStop as soon as possible and allow the engine and the coolant tocool down.
XCheck the coolant level (Ypage 267). Observe the warning notesas you do so and add coolant if necessary.
If the coolant level is correct, the engine radiator fan may be faulty.The coolant is too hot and the engine is no longer being cooled suf-ficiently.
XAt coolant temperatures below 248 ‡ (120 †), drive to the near-est qualified specialist workshop.
XAvoid heavy loads on the engine as you do so, e.g. driving inmountainous terrain and stop-and-go traffic.
Notes on towing vehicles
The vehicle is not suitable for attaching towbar systems, such as those used for flat tow-ing or dinghy towing.
Attaching or using tow bar systems may resultin damage to the vehicle.
When towing a vehicle with tow bar systems,safe driving characteristics cannot be guaran-teed for the towing vehicle or the towed vehi-cle.
The vehicle/vehicle combination may swerve.
Observe the permissible towing methods(Ypage 289) and the notes on towing withboth axles on the ground (Ypage 289).
DYNAMIC SELECT button (all vehi-
cles except Mercedes-AMG vehicles)
Use the DYNAMIC SELECT button to changethe drive program. Depending on the drive pro-gram selected the following vehicle character-istics will change:
Rthe drive (engine and transmission manage-ment)
Rthe suspension
Rthe steering
Rthe curve tilting function (vehicles withActive Body Control)
Rthe control thresholds of ESP®
Each time you start the engine with the Smart-Key or the Start/Stop button, drive programCis activated. Further information about startingthe engine (Ypage 127).
Each time you start the engine with the Smart-Key, drive programCis activated. Furtherinformation about starting the engine(Ypage 127).
132DYNAMIC SELECT button (all vehicles except Mercedes-AMG vehicles)
Driving and parking

With the SmartKey:if you then open the driv-er's door or the front-passenger door orremove the SmartKey from the ignition, theautomatic transmission shifts to]automati-cally.
With KEYLESS-GO:if you then open the driv-er's or front-passenger door, the automatictransmission shifts to]automatically.
If you want the automatic transmission toremain in neutral\\, e.g. when having thevehicle cleaned in an automatic car wash witha towing system:
XVehicles with KEYLESS-GO:remove theStart/Stop button from the ignition lock.
XInsert the SmartKey into the ignition lock.
XAll vehicles:switch the ignition on.
XDepress the brake pedal and keep itdepressed.
XShift to neutral\\.
XRelease the brake pedal.
XRelease the electric parking brake.
XSwitch off the ignition and leave the Smart-Key in the ignition lock.
Engaging drive position D
XWhen the vehicle is stationary, depress thebrake pedal.
XPush the selector lever back past the firstpoint of resistance.
Transmission positions
EPark position
This prevents the vehicle from roll-ing away when stopped.
Only shift the transmission intopositionE(Ypage 134) whenthe vehicle is stationary. The park-ing lock should not be used as abrake when parking. Always applythe electronic parking brake in addi-tion to the parking lock in order tosecure the vehicle.
If the SmartKey is removed from theignition lock, the transmission islocked.
The automatic transmission shiftstoEautomatically:
Rwhen the SmartKey is removedfrom the ignition lock
Rwhen the engine is switched offwith the transmission in positionFor:and one of thedoors is opened
In the event of a malfunction of thevehicle's electronics, the transmis-sion may lock in positionE.Have the vehicle electronicschecked immediately at a qualifiedspecialist workshop.
FReverse gear
Only shift the transmission intopositionFwhen the vehicle isstationary.
Automatic transmission137
Driving and parking
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