Battery aternator visit workshop
Discussion
Hi
Mercedes b180 cdi auto.
2006.
Bought car used.
ater a ew days the car battery went flat when not used for a day.
GEM got the car charged again.
But engine check light stayed on.
So got Battery replaced....all fine.
A week later...tonight the message pops up-
battery
alternator
visit workshop
It is a general battery/alternator/charging message.
But i am assuming it is the alternator.
But is it odd that there was no message before?
Or is it possible previous owner turned the message off?
I would have thought the message would have been popping up before the battery died?
Mercedes b180 cdi auto.
2006.
Bought car used.
ater a ew days the car battery went flat when not used for a day.
GEM got the car charged again.
But engine check light stayed on.
So got Battery replaced....all fine.
A week later...tonight the message pops up-
battery
alternator
visit workshop
It is a general battery/alternator/charging message.
But i am assuming it is the alternator.
But is it odd that there was no message before?
Or is it possible previous owner turned the message off?
I would have thought the message would have been popping up before the battery died?
If it is 12v engine off and 11.5v engine running.
And the battery/alternator/visit workshop light comes on.
Does that mean that the alternatorr is doing nothing and the battery will be flat in a couple of days running?
Or is it still doing something and ok to drive till fixed in a week or so?
And the battery/alternator/visit workshop light comes on.
Does that mean that the alternatorr is doing nothing and the battery will be flat in a couple of days running?
Or is it still doing something and ok to drive till fixed in a week or so?
Must admit to being a little confused.
It seems that tne alternator not charging probably meant tne last battery died.
But it is a week later before a problem comes up after the new battery.
Is that badically a week of starting tne engine?
The battery would not have been used for anything else but engine starts.
And that is tne reason it took a week for tne problem to reoccur?
It seems that tne alternator not charging probably meant tne last battery died.
But it is a week later before a problem comes up after the new battery.
Is that badically a week of starting tne engine?
The battery would not have been used for anything else but engine starts.
And that is tne reason it took a week for tne problem to reoccur?
The battery will be used for everything given that voltage level - the alternator is doing nothing unless it's self exciting further up the rpm range and you have a wiring/field coil issue - it's probably just the battery was big enough to last. But to be honest discharging it to 11.5v when running will not have done it any good at all.
Edited by PhillipM on Sunday 14th February 21:35
philv said:
Must admit to being a little confused.
It seems that tne alternator not charging probably meant tne last battery died.
But it is a week later before a problem comes up after the new battery.
Is that badically a week of starting tne engine?
The battery would not have been used for anything else but engine starts.
And that is tne reason it took a week for tne problem to reoccur?
Yes The battery is a store of energy the altenator replaces power used to start and run the car It seems that tne alternator not charging probably meant tne last battery died.
But it is a week later before a problem comes up after the new battery.
Is that badically a week of starting tne engine?
The battery would not have been used for anything else but engine starts.
And that is tne reason it took a week for tne problem to reoccur?
its possible the alternator was working allittle bit enough to put the warning light out
but not enough to keep the battery fully charged , as others said fully charged battery about 12.5 volts , engine running should see about 14v
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