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'72 220d, 250td, e320cdi
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249 Posts
Discussion Starter #1
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
 

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1985 190E 2.3 (Sold)
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210 Posts
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.
 

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1984 190E 2.3 8v
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119 Posts
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.
 

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Registered
'72 220d, 250td, e320cdi
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249 Posts
Discussion Starter #4
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
 
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