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Hilly Condition Usage
Note:An audible alarm sounds and thesystem shuts down if it applies brakes for anextended period of time. This allows thebrakes to cool. The system functionsnormally again after the brakes cool.
Select a lower gear when the system isactive in situations such as prolongeddownhill driving on steep grades, forexample in mountainous areas. The systemneeds additional engine braking in thesesituations to reduce the load on the vehicle’sregular brake system to prevent it fromoverheating.
Switching Adaptive Cruise Control Off
Note:You erase the set speed and gapsetting when you switch the system off.
Press OFF when the system is in standbymode, or switch the ignition off.
Detection Issues
WARNING: On rare occasions,detection issues can occur due to the roadinfrastructures, for example bridges, tunnelsand safety barriers. In these cases, thesystem may brake late or unexpectedly. Atall times, you are responsible for controllingyour vehicle, supervising the system andintervening, if required.
WARNING: If the system malfunctions,have your vehicle checked as soon aspossible.
The radar sensor has a limited field of view.It may not detect vehicles at all or detect avehicle later than expected in somesituations. The lead vehicle graphic does notilluminate if the system does not detect avehicle in front of you.
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Detection issues can occur:
When driving on a different linethan the vehicle in front.A
With vehicles that edge into yourlane. The system can only detectthese vehicles once they movefully into your lane.
B
There may be issues with thedetection of vehicles in front whendriving into and coming out of abend or curve in the road.
C
In these cases, the system may brake late orunexpectedly. You should stay alert and takeaction when necessary.
If something hits the front end of your vehicleor damage occurs, the radar-sensing zonemay change. This could cause missed orfalse vehicle detection.
System Not Available
The system may not turn on if there is:
•A blocked sensor.
•High brake temperature.
•A failure in the system or a relatedsystem.
Blocked Sensor
Note:You cannot see the sensor. It is behinda fascia panel.
A message displays if something obstructsthe radar signals from the sensor. Thesensor is in the lower grille. The systemcannot detect a vehicle ahead and does notfunction when something blocks the sensor.
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Protected ComponentsFuse RatingFuse Number
Cooling fan 2 (600W).40A 1F18
Cooling fan 2 (750W).50A 1
Anti-lock brake system module run/start.5A 2F19
Horn relay.20A 2F20
Brake pedal switch.10A 2F21
Windshield wipers and washer.25A 2F22
Run/start relay coil.5A 2F23
Transmission range control module.20A 2F24
Air conditioning clutch.10A 2F25
Powertrain control module relay coil.5A 2F26
Washer pump relay.10A 2F27
Alternator sensor.10A 2F28
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Fuses
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•Use 10 mm cables or chains only on frontaxle with 235/50R18 tires.
•Not all S-class snow chains or cablesmeet these restrictions. Chains of thissize restriction will include a tensioningdevice.
•The snow chains or cables must bemounted in pairs on the front axle.
•Do not use chains or cables on235/45R19, 245/45R19 and 255/40R20tires.
•Install cables securely, verifying that thecables do not touch any wiring, brakelines or fuel lines.
•When driving with tire cables do notexceed 30 mph (48 km/h) or themaximum speed recommended by thechain manufacturer, whichever is less.
•Drive cautiously. If you hear the cablesrub or bang against the vehicle, stop andretighten them. If this does not work,remove the cables to prevent vehicledamage.
•Remove the cables when they are nolonger needed. Do not use cables on dryroads.
If you have any questions regarding snowchains or cables, please contact yourauthorized dealer.
TIRE PRESSURE MONITORING
SYSTEM
WARNING: The tire pressuremonitoring system is not a substitute formanually checking tire pressures. You shouldperiodically check tire pressures using apressure gauge. Failure to correctly maintaintire pressures could increase the risk of tirefailure, loss of control, vehicle rollover andpersonal injury.
Note: You should only use tire sealants inroadside emergencies as they may causedamage to the tire pressure monitoringsystem sensor.
Note: If the tire pressure monitoring systemsensor becomes damaged, it may notfunction.
Each tire, including the spare (ifprovided), should be checkedmonthly when cold and inflated tothe inflation pressure recommended by thevehicle manufacturer on the vehicle placardor tire inflation pressure label. (If your vehiclehas tires of a different size than the sizeindicated on the vehicle placard or tireinflation pressure label, you shoulddetermine the proper tire inflation pressurefor those tires).
As an added safety feature, your vehicle hasbeen equipped with a Tire PressureMonitoring System (TPMS) that illuminates alow tire pressure telltale when one or moreof your tires is significantly under-inflated.Accordingly, when the low tire pressuretelltale illuminates, you should stop andcheck your tires as soon as possible, andinflate them to the proper pressure. Drivingon a significantly under-inflated tire causesthe tire to overheat and can lead to tirefailure. Under-inflation also reduces fuelefficiency and tire tread life, and may affectthe vehicle’s handling and stopping ability.
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Wheels and Tires
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If you get a flat tire when driving, do notapply the brake heavily. Instead, graduallydecrease your speed. Hold the steeringwheel firmly and slowly move to a safe placeon the side of the road.
Have a flat serviced by an authorized dealerin order to prevent damage to the tirepressure monitoring system sensors. SeeTire Pressure Monitoring System (page 332).Replace the spare tire with a road tire assoon as possible. During repairing orreplacing of the flat tire, have the authorizeddealer inspect the tire pressure monitoringsystem sensor for damage.
Dissimilar Spare Wheel and TireAssembly Information
WARNING: Failure to follow theseguidelines could result in an increased riskof loss of vehicle control, injury or death.
If you have a dissimilar spare wheel and tire,then it is intended for temporary use only.This means that if you need to use it, youshould replace it as soon as possible with aroad wheel and tire assembly that is thesame size and type as the road tires andwheels that were originally provided by us.If the dissimilar spare tire or wheel isdamaged, it should be replaced rather thanrepaired.
A dissimilar spare wheel and tire assemblyis defined as a spare wheel and tire assemblythat is different in brand, size or appearancefrom the road tires and wheels and can beone of three types:
1. T-type mini-spare: This spare tire beginswith the letter T for tire size and may haveTemporary Use Only molded in the sidewall.
2. Full-size dissimilar spare with label onwheel: This spare tire has a label on thewheel that states: THIS WHEEL AND TIREASSEMBLY FOR TEMPORARY USE ONLY.
When driving with one of the dissimilar sparetires listed above, do not:
•Exceed 50 mph (80 km/h).
•Load the vehicle beyond maximumvehicle load rating listed on the SafetyCompliance Label.
•Tow a trailer.
•Use snow chains on the end of thevehicle with the dissimilar spare tire.
•Use more than one dissimilar spare tireat a time.
•Use commercial car washing equipment.
•Try to repair the dissimilar spare tire.
Use of one of the dissimilar spare tires listedabove at any one wheel location can lead toimpairment of the following:
•Handling, stability and brakingperformance.
•Comfort and noise.
•Ground clearance and parking at curbs.
•Winter weather driving capability.
•Wet weather driving capability.
•All-wheel driving capability
3. Full-size dissimilar spare without labelon wheel
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