Electrical problem

[lizard121]

Need advice....my E30 keeps loosing battery charge. Drove it home the other day and have just gone to start it and nothing, after only two days. The only thing I can think of is that it must be draining power from somewhere but where to start looking?? any ideas or common faults to look for first? It's a 1987 325i.

Thanks all!!

[Speedtouch]

Also check that the glovebox and boot lights aren't sticking on - a common cause of mysterious battery discharge.