Battery
Notes on the battery
In order for the battery to achieve the maximum possible service life, it must always be sufficiently charged.
Have the battery charge checked more frequently if you use the vehicle mainly for short trips or if you leave it standing idle for a lengthy period.
To prevent damage from corrosion, only replace the battery with one that has a central ventilation cover. Mercedes-Benz recommends that, for safety reasons, you only use batteries which have been tested and approved for your vehicle by Mercedes-Benz.
Consult a Mercedes-Benz Service Centre if you wish to leave your vehicle parked up for a long period of time.
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Comply with safety precautions and take protective measures when handling batteries.
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Risk of explosion
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Fire, naked flames and smoking are prohibited when handling the battery. Avoid creating sparks.
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Battery acid is caustic. Avoid contact with the skin, eyes or clothing.
Wear suitable protective clothing, in particular, gloves, an apron and face mask.
Immediately rinse acid splashes off with clean water. Consult a doctor if necessary.
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Wear eye protection.
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Keep children away.
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Observe this Owner's Manual.
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 | Environmental note |
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Do not dispose of batteries with the household rubbish. Dispose of defective batteries in an environmentally responsible manner. Take them to a Mercedes-Benz Service Centre or a special collection point for old batteries.
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| Risk of injury |
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Mercedes-Benz recommends that, for safety reasons, you only use batteries which have been tested and approved for your vehicle by Mercedes-Benz. These batteries provide increased impact protection to prevent vehicle occupants from suffering acid burns should the battery be damaged in the event of an accident.
To prevent acid burns, observe the following safety notes when handling batteries:
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Do not lean over batteries.
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Do not place any metal objects on a battery. You could otherwise cause a short circuit and the battery's highly flammable gas mixture could ignite.
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Make sure that you do not create electrostatic charge, e.g. by wearing synthetic clothing or as a result of friction on fabrics. You should not therefore pull or slide the battery over carpets or other synthetic materials.
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Never touch the battery first. To discharge a possible electrostatic charge, step out of the vehicle first and touch the bodywork.
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Do not wipe the battery using a cloth. The battery may explode as a result of electrostatic charge or through the creation of sparks.
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Switch the engine off and remove the key before unscrewing or disconnecting the terminal clamps from the battery. You may otherwise destroy electronic components such as the alternator.
Have the starter battery checked and, if necessary, replaced at a qualified specialist workshop, e.g. a Mercedes-Benz Service Centre, every two years or at least every 20,000 km.
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Mercedes-Benz recommends that you have all work involving the battery, e.g. disconnecting, removing, charging and replacing, carried out at a qualified specialist workshop, e.g. a Mercedes-Benz Service Centre.
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Installation location of the battery
Disconnecting the battery
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If the battery is disconnected:
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there is no brake boosting effect and you will need to apply more pressure to brake and the brake pedal travel will be longer; you may have to depress the brake pedal with full force
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you can no longer turn the key in the ignition and with KEYLESS GO*, pressing the KEYLESS GO button* on the selector lever will have no effect
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the selector lever is locked in position P on vehicles with automatic transmission*
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Always disconnect the battery in the sequence described below. Never swap the terminal clamps. You may otherwise damage the vehicle electronics.
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 | Clamps |
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Firmly depress the parking brake and shift the selector lever to position P on vehicles with automatic transmission*.
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Switch off all electrical consumers.
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Turn the key to position 0 in the ignition lock and remove it.
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Open the bonnet.
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Remove clamp from the filter box.
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Pull the filter box forwards and then upwards to remove it.
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Remove the negative terminal clamp from the battery.
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Remove the cover from the positive terminal clamp.
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Remove the positive terminal clamp from the battery.
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Disconnect the breather hose.
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Removing the battery
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Disconnect the battery more.
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Unscrew the battery holder that stops the battery from slipping.
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Remove the battery.
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Charging and fitting the battery
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Only charge the installed battery with a battery charger which has been tested and approved by Mercedes-Benz. These battery chargers allow the battery to be charged while it is still installed. Otherwise, the vehicle's electronic system may be damaged. Only charge the battery in a well-ventilated area. As the battery is being charged, gases can escape and generate minor explosions. This may injure you and other persons or cause damage to the paintwork or acid corrosion on the vehicle.
You can obtain information about battery chargers which allow the battery to be charged when still installed from a qualified specialist workshop, e.g. a Mercedes-Benz Service Centre.
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| Risk of injury |
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There is a risk of acid burns during the charging process due to the gases which escape from the battery. Do not lean over the battery during the charging process.
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Only use battery chargers with a maximum charging voltage of 14.8 V.
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Charge the battery. Observe the notes in the operating instructions for your battery charger.
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Refit the charged battery.
To do this, follow the steps described in "Removing the battery" more in reverse order.
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Original Element p durch Gültigkeiten gefiltert!
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Battery acid is caustic. Avoid contact with the skin, eyes or clothing.
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Reconnecting the battery
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Always reconnect the battery in the sequence described below. Never swap the terminal clamps. You may otherwise damage the vehicle electronics.
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Switch off all electrical consumers.
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Connect the positive terminal clamp and secure the cover.
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Connect the negative terminal clamp.
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Connect the breather hose. Make sure that a cell cap is fitted between the battery and the breather hose.
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Attach the filter box retaining lugs to the air duct.
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Attach the three clamps and close.
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Close the bonnet.
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If the battery power supply has been interrupted (e.g. if it has been reconnected), you must carry out the following tasks:
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Set the time more.
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Reset the sliding/tilting sunroof* more.
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Reset the function for folding the exterior mirrors in/out automatically* by folding the mirrors out once more.
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Reset the side windows more.
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