[rib]

the battery on my parents 190d seems to go flat about once a month or so, 3 times since they bought the car. they only do town driving, a long run maybe once a month. aftermarket parts include an alarm/immobaliser and a face off sterio, all fitted prior to purchase. it shows no signs that the battery is about to give up the next morning

 

[DW201]

So they only drive it maybe once a month? Do they even start it up within that month? That might be the problem right there.

 

[SRDiver]

there is enough drain from the alarm and stereo memory to kill the battery in about 21-28 days. I wouls suggest a 1.8 solar powered battery charger that plugs into the cigerette lighter. If they park inside then purchase a small remote trickle charger that they plug in when the car is not used.

 

[rib]

no sorry, i didnt explain very well.. they use the car pretty much daily,, around town, and maybe once a month take it out on a long run, but it is used daily. and once every few weeks the battery will just be randomly dead in the morning