Xenon Planet is one of the largest and fastest growing online retailers of specialized automotive products in the USA, Australia, Canada and all around the globe. We take pride in offering the best A2059053414 A2054400073 A2059052809 auxiliary battery voltage converter. If you are getting an auxiliary battery malfunction warning and it keeps flashing on the dashboard, it means that the capacitor has failed and needs to be replaced. It is a direct replacement and work is DIY. Additional battery fitted on Mercedes-Benz cars for locking doors and eco start stop function. For further details about the product and compatibility list visit our website.