Hi. I forgot to switch of my ign on my W207. After about 4 hours I noticed the light were on. When I went to start it a message on the dash saying Steering fault and also the restraint are not functioning. It also won’t run. Would this down to the battery being low. It was working perfectly prior to this? Thanks for the input.
Ignition left on
- Thread starter nuffer
- Start date
I suspect you've killed your battery.
Ask me how I know!
I did the same thing on my car when it was dropped off for an audio upgrade once and that was only on for a couple of hours.
I was able to use the car but the battery kept dropping out after a weekend of being off but I didn't have a charger at the time.
It's worth using a modern charger on it to see what that can do to it (if you don't have one, I recommend the Maypole 7428 unit as that is what I have).
That will take a while I suspect (probably overnight) to get it back to 100% if that is possible still.
Otherwise if you still suffer after fully charging it, you may have irreparably damaged the battery.
When the power is low, you will get all sorts of errors and things not working so I wouldn't worry about that at this stage - especially as you state it was fine before.
Ask me how I know!
I did the same thing on my car when it was dropped off for an audio upgrade once and that was only on for a couple of hours.
I was able to use the car but the battery kept dropping out after a weekend of being off but I didn't have a charger at the time.
It's worth using a modern charger on it to see what that can do to it (if you don't have one, I recommend the Maypole 7428 unit as that is what I have).
That will take a while I suspect (probably overnight) to get it back to 100% if that is possible still.
Otherwise if you still suffer after fully charging it, you may have irreparably damaged the battery.
When the power is low, you will get all sorts of errors and things not working so I wouldn't worry about that at this stage - especially as you state it was fine before.
OP
OP
nuffer
Member
Yes I suspect as much. Well it’s on charge and see in the morning. Cars only 5 years so hopefully the battery is ok.I suspect you've killed your battery.
Ask me how I know!
I did the same thing on my car when it was dropped off for an audio upgrade once and that was only on for a couple of hours.
I was able to use the car but the battery kept dropping out after a weekend of being off but I didn't have a charger at the time.
It's worth using a modern charger on it to see what that can do to it (if you don't have one, I recommend the Maypole 7428 unit as that is what I have).
That will take a while I suspect (probably overnight) to get it back to 100% if that is possible still.
Otherwise if you still suffer after fully charging it, you may have irreparably damaged the battery.
When the power is low, you will get all sorts of errors and things not working so I wouldn't worry about that at this stage - especially as you state it was fine before.
My aux was 18 months and my main was 12 months old (MB recommend changing them at the same time so my supplying dealer should have changed the main, as they changed the aux before I bought it, but I didn't find out the recommendation until much later so academic in the end).
I think the consensus was mine shouldn't have behaved like it did though and MB agreed and changed both batteries under warranty.
The car is clever enough to shut down COMAND etc. after a period of inactivity so the initial current draw on my car in I2 (apparently 40amps initially) shouldn't carry on forever.
However, if your battery is 5 years old OP, that may be a different story but still worth trying.
I've brought a 2 year old battery up to 100% before now.
I think the consensus was mine shouldn't have behaved like it did though and MB agreed and changed both batteries under warranty.
The car is clever enough to shut down COMAND etc. after a period of inactivity so the initial current draw on my car in I2 (apparently 40amps initially) shouldn't carry on forever.
However, if your battery is 5 years old OP, that may be a different story but still worth trying.
I've brought a 2 year old battery up to 100% before now.
Users who are viewing this thread
Similar threads
