2019 MERCEDES-BENZ SLC snow chains

pressure loss warning system" section(Ypage 274).
Important safety notes
The tire pressure warning system does notwarn you of an incorrectly set tire pressure.Observe the notes on the recommended tirepressure (Ypage 270).
The tire pressure loss warning does notreplace the need to regularly check the tirepressure. An even loss of pressure on severaltires at the same time cannot be detected bythe tire pressure loss warning system.
The tire pressure monitor is not able to warnyou of a sudden loss of pressure, e.g. if thetire is penetrated by a foreign object. In theevent of a sudden loss of pressure, bring thevehicle to a halt by braking carefully. Avoidabrupt steering movements.
The function of the tire pressure loss warningsystem is limited or delayed if:
Rsnow chains are mounted on your vehicle'stires.
Rroad conditions are wintry.
Ryou are driving on sand or gravel.
Ryou adopt a very sporty driving style (corner-ing at high speeds or driving with high ratesof acceleration).
Ryou drive with a heavy load.
Restarting the tire pressure loss warn-
ing system
Restart the tire pressure loss warning systemif you have:
Rchanged the tire pressure
Rchanged the wheels or tires
Rmounted new wheels or tires
XBefore restarting, make sure that the tirepressures are set properly on all four tiresfor the respective operating conditions.
The recommended tire pressure can befound on the Tire and Loading Informationplacard on the B-pillar. Additionally, a tirepressure table is attached to the fuel fillerflap. The tire pressure loss warning systemcan only give reliable warnings if you haveset the correct tire pressure. If an incorrect
tire pressure is set, these incorrect valueswill be monitored.
XAlso observe the notes in the section on tirepressures (Ypage 270).
XMake sure that the SmartKey is in positionHin the ignition lock (Ypage 118).
XPress theYorebutton on the steer-ing wheel to select theServ.Serv.menu.
XPress thecordbutton to selectTire PressureTire Pressure.
XPress thevbutton.TheRun Flat Indicator Active PressRun Flat Indicator Active Press'OK' to Restart'OK' to Restartmessage appears in themultifunction display.
If you wish to confirm the restart:
XPress thevbutton.TheTire Pressure Now OK?Tire Pressure Now OK?messageappears in the multifunction display.
XPress thecordbutton to selectYesYes.
XPress thevbutton.TheRun Flat Indicator RestartedRun Flat Indicator Restartedmes-sage appears in the multifunction display.
After a teach-in period, the tire pressureloss warning system will monitor the set tirepressures of all four tires.
If you wish to cancel the restart:
XPress the8button.
or
XIf theTire Pressure Now OK?Tire Pressure Now OK?messageappears, use thecordbutton toselectCancelCancel.
XPress thevbutton.The tire pressure values stored at the lastrestart will continue to be monitored.
Tire pressure monitor
General notes
If a tire pressure monitor is installed, the vehi-cle's wheels have sensors that monitor the tirepressures in all four tires. The tire pressuremonitor warns you if the pressure drops in oneor more of the tires. The tire pressure monitoronly functions if the corresponding sensorsare installed in all wheels.
Information on tire pressures is displayed inthe multifunction display. After a few minutesof driving, the current tire pressure of each tire
274Tire pressure
Wheels and tires

When using an emergency spare wheel orspare wheel of a different size, you must notexceed the maximum speed of 50 mph(80 km/h).
Snow chains must not be mounted on emer-gency spare wheels.
General notes
You can ask for information regarding permit-ted emergency spare wheels at an authorizedMercedes-Benz Center.
You should regularly check the pressure of theemergency spare wheel, particularly prior tolong trips, and correct the pressure as neces-sary (Ypage 270). The value on the wheel isvalid.
An emergency spare wheel may also be moun-ted against the direction of rotation. Observethe time restriction on use as well as thespeed limitation specified on the emergencyspare wheel.
Replace the tires after six years at the latest,regardless of wear. This also applies to theemergency spare wheel.
When you are driving with the collapsiblespare wheel mounted, the tire pressure losswarning system or the tire pressure monitorcannot function reliably. Only restart the tirepressure loss warning system or tire pressuremonitor when the defective wheel has beenreplaced with a new wheel.
Vehicles with tire pressure monitor:aftermounting an emergency spare wheel, the sys-tem may still display the tire pressure of theremoved wheel for a few minutes. The valuedisplayed for the mounted emergency sparewheel is not the same as the current tire pres-sure of the emergency spare wheel.
Removing the emergency spare
wheel
Vehicles with a collapsible spare
wheel
The collapsible spare wheel can be found inthe stowage well under the trunk floor(Ypage 227).
XTurn retaining screwDcounter-clockwiseand remove it.
XRemove collapsible spare wheelC.
Always observe the instructions and safetynotes in the "Mounting a wheel" section(Ypage 289).
Stowing the emergency spare wheel
!Only place the collapsible spare wheel inthe vehicle when it is dry. Otherwise, mois-ture may get into the vehicle.
Take the following steps to stow a used col-lapsible spare wheel. Otherwise, the collapsi-ble spare wheel will not fit in the trunk in theintended manner. Mercedes-Benz recom-mends that you have this work carried out at aqualified specialist workshop.
XUnscrew the valve cap from the valve.
XIf possible, unscrew the valve insert fromthe valve and release the air.Fully deflating the tires can take a fewminutes.
XScrew the valve insert back into the valve.
XScrew the valve cap back on.
XPull the protective sheet provided with thespare wheel over the collapsible sparewheel.
XStow the collapsible spare wheel in theemergency spare wheel well under thetrunk.
XUse the retaining screw to pierce the pro-tective sheet and fasten the collapsiblespare wheel in place.
294Emergency spare wheel
Wheels and tires