Hello! I also had a problem with my starter battery (MK III, year 11.2001 Diesel, Kombi). However, I have the reason on the hand–> stand-up heating and unfortunately only short distance at the moment. I installed a new Varta (even the one recommended for the Ford) 2 weeks ago. Now I got a battery about 2 months old yesterday (80 Ah, high cold test current, also silver CA technology) from a friend. Now to my question: does this work as I imagine it: I would like to fix this battery in the trunk of the station wagon – at least in the winter months. I think best of all with separation relays, as a pure consumer battery for the stationary heating + blower. Then, if the vehicle stopped, the juice would only be pulled out of the rear bat. Perhaps I would also install a separation switch if at all necessary, with which I completely separate the second battery from the starter battery before I drive, so that the Lima only charges the starter battery. I charge the second battery every few days with a charger that I have been ready to install in the car for a long time. Only it has not proven to operate the preheating exclusively via the starter battery – despite intermittent charging over the charger. The other point is: I have heard that only one gel battery should be installed in the car. together with the gas generated during the charging process (I wouldn’t let the second battery charge as described by the Lima). Or is the reason for this more likely danger in case of an accident (sulphuric acid)? For tips I would be very grateful, L.G. Oliver