Sorry for starting a new thread on this but I really need some help please. My leisure battery doesn’t charge while driving (even for long journey) and I have been back and forth with my local dealership, Mercedes Epsom for a few times now and the issue is still not resolved. The vehicle is currently with them and has been there since last Wednesday as they couldn’t figure out what’s causing the issue so they logged the case with the Technical Department in Milton Keynes. However, all they advised was that the battery would need to be charged through the charging cable to be at least 12.5v before the alternator charge can kick in. When I took the vehicle in last week, the battery was 50% charged with 12.4v, but I’m not sure if charging the battery to above 12.5v would make any difference as I previously tested the vehicle when there was only two bars dropped and with higher than 12.5v (although not 100% certain). Please can anyone confirm this or possibly even offer a solution?