The Genuine Mercedes Battery Trickle Charger - 0009820221 is a high-quality battery charger specifically designed for use with Mercedes vehicles. This charger is compact and easy to use, making it a convenient option for keeping your car's battery charged and maintained. It features a trickle charge function that helps prevent overcharging and extends the life of your battery. The charger also has a built-in microprocessor that monitors the charging process and adjusts the voltage accordingly. With its durable construction and reliable performance, the Genuine Mercedes Battery Trickle Charger is a must-have for any Mercedes owner.