Greetings from the UK. Have joined the community to sample the wisdom on battery problems. Two weeks ago bought a used low-mileage ForTwo Passion 84 from a M-B dealership (has factory-fitted alarm, rev counter, clock). The car's battery was flat when first inspected. They said no problem will charge it up. OK on delivery but after leaving for 3 days the battery was flat. Charged up again OK but clearly a draining problem. Will look to dealer to solve but good to be fore-armed with info from this site, thanks.