Work on the battery, e.g. removing or installing, requires specialist knowledge and the use of special tools. Therefore, always have work on the battery carried out at a qualified specialist workshop.
Work carried out incorrectly on the battery can, for example, lead to a short circuit. This can restrict functions relevant for safety systems and impair the operating safety of your vehicle.
when braking
in the event of abrupt steering manoeuvres and/or when the vehicle's speed is not adapted to the road conditions
For safety reasons, Mercedes-Benz recommends that you only use batteries that 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 an accident.
Electrostatic charge can ignite the highly explosive gas mixture in the battery.
The highly flammable gas mixture is created while the battery is charging and when jump-starting.
Make sure that neither you nor the battery is electrostatically charged.
You are wearing synthetic clothing.
There is friction between your clothing and the seat.
You drag or push the battery across a carpet or other synthetic materials.
You rub the battery with cloths or towels.
Battery acid is caustic.
Batteries contain pollutants. It is illegal to dispose of them with the household rubbish.
Dispose of batteries in an environmentally responsible manner. Take discharged batteries to a qualified specialist workshop or to a collection point for used batteries. Observe the safety notes and protective measures when handling batteries.
Risk of explosion 
Fire, naked flames and smoking are prohibited when handling the battery. Avoid creating sparks. 
Electrolyte or battery acid is corrosive. Avoid contact with the skin, eyes and clothing. Wear suitable protective clothing, in particular gloves, an apron and a safety mask. Immediately rinse electrolyte acid splashes off with clean water. If necessary, seek medical advice. 
Wear eye protection. 
Keep children at a safe distance. 
Observe these Operating Instructions.
Recharge the battery more frequently in the following cases:
You predominantly drive short distances.
You predominantly drive at low outside temperatures.
You leave the vehicle parked for a lengthy period.
In order for the batteries to achieve their maximum possible service life, they must always be sufficiently charged.
Consult a qualified specialist workshop if you wish to leave your vehicle parked up for a long period of time.
When you park the vehicle, remove the key if you do not require any electrical consumers. The vehicle will then use very little energy, thus conserving battery power.
If your vehicle requires jump-starting, or if you wish to provide jump-starting assistance to another vehicle, only use the jump-start connection point in the engine compartment More.
Starter battery
Support battery