after not using the van for a few weeks, I tried to start. Engine tried to
turn over but very lazily. Added a booster battery but still very lazy
turnover til eventually battery gave up.  After a few minutes of rest,
attempted again to start but nothing whatsoever. No sound at all. After
another few minutes of waiting, I tried again. And now very loud and fast
clicking noises but nothing else. Can't describe it better :-(. Any
suggestions?

Karl.