2010 Mercedes R-Class Owner's Manual - Page 337

251_AKB; 4; 52, en-US d2ureepe, 2009-03-23T09:22:52+01:00 - Seite 335 Version: 2.11.8.1 Battery battery cover is non-removable. Do not attempt to open the battery as otherwise the battery will be damaged. VRLA batteries do not require topping-up of the electrolyte level. They cannot be opened to check the electrolyte level. However, the battery condition must be checked periodically by performing a battery conductance test. Refer to Maintenance Booklet for battery condition testing intervals. The factory-equipped battery may only be replaced with a battery that Rhas Ris Ris Ris 335 authorized Mercedes-Benz Center for further information. the same security features of identical size of identical voltage of identical capacity ! As any other battery, the battery may discharge if you do not operate the vehicle for an extended period of time. Have the battery disconnected at a qualified workshop or an authorized Mercedes-Benz Center in such a case. You may also connect an accessory battery charge unit expressly approved by Mercedes-Benz for your vehicle model to maintain the battery charge. Contact an authorized MercedesBenz Center for further information. The battery, the battery ventilation hose and the lateral plug must always be securely installed when the vehicle is in operation. ! Never loosen or detach battery terminal clamps while the engine is running or the SmartKey is in the starter switch or KEYLESS-GO button is in position 1. Otherwise the alternator and other electronic components could be severely damaged. Have the battery checked regularly at an authorized Mercedes-Benz Center. Refer to Maintenance Booklet for maintenance intervals or contact an Charging the battery Never charge a battery while still installed in the vehicle unless the accessory battery charge unit approved by Mercedes-Benz is being used. Gases may escape during charging and could cause an explosion that may result in personal injury, paint damage or corrosion. An accessory battery charge unit specially adapted for Mercedes-Benz vehicles and tested and approved by Mercedes-Benz is available. It permits the charging of the battery in its installed position. Contact an authorized Mercedes-Benz Center for information and availability. Charge battery in accordance with the separate instructions for the accessory battery charger. G Warning! Have the battery charged at an authorized Mercedes-Benz Center. If you charge the battery yourself, follow the operating instructions for your charging device. Z Practical hints i After battery power was interrupted, do the following: RSet the clock (Y page 133). Vehicles with COMAND system with navigation module: Time and date are set automatically. RSynchronize the door windows (Y page 107). RSynchronize the power tilt/sliding sunroof (Y page 183). RSynchronize the power tilt/sliding panel (Y page 186). RSynchronize the exterior rear view mirrors (Y page 96).