Mercedes-Benz S-CLASS SEDAN 2023 ECO Start/Stop Function User Manual
ECO Start/Stop Function
ECO start/stop function
Depending on the engine, the ECO start/stop function is not available in all drive programs. Observe the status display on the driver’s display concerning this.
Plug-in hybrid: this function is not available.
The engine will be switched off automatically in the following situations if all vehicle conditions for an automatic engine stop are met:
- You brake the vehicle to a standstill in transmission position h or i.
- Vehicles with a 48 V on-board electrical system: you depress the brake pedal when traveling at a low speed.
If the system has detected one of the following situations, the engine will not stop:
- You stop at a stop sign and there is no vehicle in front of you.
- The vehicle that stopped in front of you starts up again.
- You maneuver, turn the steering wheel sharply or engage reverse gear.
- If the system detects an intelligent stop inhibitor, e.g. a stop sign, the engine will not stop. If you activate the HOLD function or engage park position j, the engine can be switched off in spite of an intelligent stop inhibitor.
The engine will restart automatically in the following cases:
- You engage transmission position h or k.
- You depress the accelerator pedal.
- The vehicle requires an automatic engine start.
- You release the brake pedal.
- Vehicles with a 48 V on-board electrical system:
ECO start/stop function symbols on the driver’s display:
- The symbol (green) appears when the vehicle is at a standstill: the engine was switched off by the ECO start/stop function.
- The symbol (yellow) appears when the vehicle is at a standstill: not all vehicle conditions for an engine stop have been met.
- Neither the è symbol nor the ç symbol appears when the vehicle is at a standstill: an intelligent stop inhibitor, e.g. a stop sign, has been detected.
- The s symbol appears: the ECO start/stop R The s symbol appears: the ECO start/stop
- If the engine was switched off by the ECO start/stop function and you leave the vehicle, a warning tone will sound and the engine will not be restarted.
In addition, the following display message will appear on the driver’s display:
Vehicle Ready to Drive Switch the Ignition Off Before Exiting
If you do not switch off the vehicle, it will automatically be switched off after three minutes.
Switching the ECO start/stop function on/off
- Observe the notes in the Supplement.
You could otherwise fail to recognize dangers
The ECO display assesses the following criteria for an economical driving style:
- Coasting at the right times
- Consistent speed
- Moderate acceleration
The overall assessment of your driving style “from start” is indicated using stars 1. It starts with five empty stars, which you can fill one after the other if you drive efficiently. When all five stars are filled, a glow will appear in the background. You can call up the ECO Display function via the Classic and Exclusive menus (/ page 322).
ECO Assist function (vehicles with 48 V on-board electrical system)
For plug-in hybrids, note the ECO Assist information (/ page 216).
ECO Assist is active only in drive programs, and A. ECO Assist analyzes data for the vehicle’s expected route. This allows the system to optimally adjust the driving style for the route ahead, save fuel and recuperate. If the system detects an event ahead and the vehicle nears the event, ECO Assist will calculate the optimum speed for maximum fuel economy and recuperative energy based on the distance, speed and downhill gradient.
If the deceleration provided by ECO Assist is not sufficient, you must also brake with the service brake. This is especially the case if, for example, you pull away again in slow-moving traffic and the distance to the vehicle in front is very short.
- Foot off the accelerator” recommendation
- Route event ahead
If a routed event ahead or a vehicle driving in front is detected which requires an adjustment to your driving style to ensure greater efficiency, the corresponding symbol 2 and the ý symbol (gray) will be displayed. If you release the accelerator pedal, the ý symbol will turn green, and recuperation in over-run mode will be initiated. If the deceleration is not sufficient, also apply the service brake. If ECO Assist intervenes for a routed event ahead (not for a vehicle in front) and you then press the accelerator pedal again, you end ECO Assist’s control.
The ECO Assist display is hidden again in the following cases:
- You do not react to the ECO Assist recommendation for a long time.
- You press the accelerator pedal while ECO Assist is intervening for a route event ahead (not for a vehicle in front).
- ECO Assist cannot identify any further recommendations from the route ahead.
- In addition to a vehicle in front ¥, ECO Assist can detect the following route events 2 depending on the vehicle’s equipment:
- Traffic circle
- Sharp curve
- Downhill gradient
- Speed limit
- In drive program A, ECO Assist only reacts to the route event “Vehicle in front”.
If the calculated route is adhered to when route guidance is active, ECO Assist will operate with greater accuracy. The basic function is also available without active route guidance. Not all information and traffic situations can be foreseen. The quality depends on the map data.
ECO Assist is only an aid. The driver is responsible for keeping a safe distance from the vehicle in front, for vehicle speed, and for braking in good time.
The system may be impaired or may not function in the following situations:
- If there is poor visibility, e.g. due to insufficient illumination of the road, highly variable shade conditions, rain, snow, fog or heavy spray.
- If there is glare, e.g. from oncoming traffic, direct sunlight or reflections.
- If the windshield is dirty in the vicinity of the multifunction camera.
- If the multifunction camera is fogged up, damaged or obscured.
- If road signs are hard to detect, e.g. due to dirt, snow or insufficient lighting, or because they are obscured.
- If the information in the navigation system’s digital map is incorrect or out of date.
- If signs are ambiguous, e.g. road signs in the road- works or in adjacent lanes.
- If the radar sensors are dirty or obscured.
- When you drive on roads with steep uphill or downhill gradients.
- If there are narrow vehicles in fronts, such as bicycles or motorcycles.
Regenerative Brake System (plug-in hybrid)
The function of the recuperative brake system
Depending on the selected recuperation level, the electric motor will be operated as an alternator when in overrun mode and during braking in order to charge the high-voltage battery during driving. As soon as you take your foot off the accelerator pedal when the vehicle is in motion and in trans-mission position h, recuperation in overrun mode will be initiated.
The higher the recuperation, the stronger the braking effect will be during coasting and the more electrical energy will be fed into the high-voltage battery.
The deceleration in overrun mode may not be sufficient depending on the driving conditions. Decelerating to a standstill is not possible. Also, brake with the service brake if necessary. Always adapt your speed to the driving conditions and keep a sufficient distance.
The recuperative brake system has the following characteristics:
- Supports braking with electronically controlled brake force boosting R converts the kinetic energy of the vehicle into electric energy
- If you brake hard, the mechanical brake will also be used. This means that the maximum recuperative energy cannot be recovered. The more you drive and brake in an anticipatory manner, the more efficiently energy can be recuperated.
The braking effect of the electric motor during recuperation in overrun mode may be reduced or may not be available at all in the following situations:
- When the high-voltage battery state of charge increases
- If the high-voltage battery is not yet at a normal operating temperature
In these cases, the desired deceleration will be set by the brake control system.
Manually Setting Recuperative Deceleration
- Observe the notes in the Supplement.
You could otherwise fail to recognize dangers.
You can use the steering wheel paddle shifters to adjust the intensity of recuperation in drive programs n, o and Î.
The following recuperation levels are available:
- Smart and anticipatory recuperation with ECO Assist (/ page 216)
- No recuperation: the vehicle will roll freely
- Normal recuperation
- Increased recuperation: heavy deceleration in overrun mode, e.g. for driving on downhill gradients
- If the ECO Assist function is activated in the multimedia system (/ page 217).
- If the ECO Assist function is deactivated in the multimedia system.
- It Will be available only if the ECO Assist function is activated in the multimedia system and if the function of the radar sensors is not impaired. Also observe the information on vehicle sensors and cameras (/ page 253).
- To increase recuperation: briefly pull paddle shifter 1.
- To reduce recuperation: briefly pull the paddle shifter 2.
- Standard setting: pull and hold paddle shifter 1 or 2, or engage transmission position h again.
When the vehicle is started again, the standard setting will also be set.
The driver’s display shows the currently selected recuperation level next to the transmission position display.
Mercedes-Benz 2023 Top Accessories
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