2005 Mercedes SL-Class Owner's Manual - Page 403

Practical hints Batteries Batteries For more information on batteries, see "Battery" ( page 277). Your vehicle is equipped with two batteries: The starter battery The battery for electrical consumers (consumer battery), located in the trunk The starter battery is located on the right-hand side of the engine compartment. ! The starter battery, its filler caps, and the vent tube must always be securely installed when the vehicle is in operation. The consumer battery is located on the right-hand side of the trunk. require topping-up of the electrolyte level. VRLA batteries therefore do not have cell caps and the battery cover is non-removable. Do not attempt to open the consumer battery as otherwise the battery will be damaged. Even though VRLA batteries do not require topping-up of the electrolyte level and cannot be opened to check the electrolyte level, the battery condition must be checked periodically by performing a battery conductance test. Refer to Maintenance Booklet for battery condition testing intervals. As with any other battery, disconnect the consumer battery if you do not intend to operate your vehicle for an extended period of time to prevent battery discharge. Contact an authorized Mercedes-Benz Center for further information. 3 Positive terminal 4 Negative terminal ! 1 Positive terminal 2 Negative terminal The consumer battery located in the trunk is valve-regulated lead acid (VRLA) battery, also referred to as "fleece" battery. Such batteries do not 401