What causes car batteries to go flat?
What Causes a Car Battery to Keep Dying? Some of the most common reasons for a car battery to die repeatedly include loose or corroded battery connections, persistent electrical drains, charging problems, constantly demanding more power than the alternator can provide, and even extreme weather.
Why is the battery on my Mercedes SLK flat?
I’ve just this week had to charge the battery on my SLK as it was flat after a longish lay-up. I charged it off the car overnight and before re-connecting the terminals I turned the sidelights on to provide a load to hopefully stop any voltage spikes from a fully charged battery harming the electronics.
What causes battery to die on Mercedes medic?
A defective electrical system, Control Unit or a fault on the CAN Bus (Controller Area Network) are also causes that can cause your Mercedes-Battery battery to die. To troubleshoot the current draw, you need a multimeter that can perform current reading.
What causes battery to go flat when not used?
Expert: Matt replied 7 years ago. the best way to find what circuit is causing the excessive currant drain is to fit a current sensing multimeter in series with the positive battery lead on the car and the battery, or use a current clamp meter on the battery positive cable.
What should I do if my Mercedes battery is flat?
The dodgy car in the MB range is the phase 1 203 cars, up to the face lift 04-04 If the battery was dead flat,, then I would have said disconnect, as the voltage from the charger could rise to a dangerous level, as long as there is some voltage left then the voltage cannot rise so high. Click to expand… What would be this level, 15V 16v 17V ?
Why is my Mercedes SLK Battery going flat when not used?
Once you’ve isolated the circuit with the excessive drain check the wiring connections and plugs to components and the wiring harness that runs by the engine bay fuse box – the wiring harness chaffs / rubs through and gets damaged – but its not always easy to see so be careful when checking.. Customer: replied 7 years ago.
Why does my Mercedes-Benz battery keep draining?
You try to start your Mercedes-Benz and the car is either completely dead or this happens: Battery drains happen when electronic equipment (consumer units) are constantly drawing current from the battery while the car is parked. One simple example is when lights are left on overnight. But it’s not always as simple as that.
When to replace battery in Mercedes medic medic?
Make sure you have a fully charged battery. If your battery is over 6 years old, you should consider replacing it to avoid further electrical nightmares. You can save on the cost of the battery by purchasing it online. For example, see this list of AGM Group 94 batteries for Mercedes-Benz on Amazon. Turn off the lights.
Why does my Bas light come on in my Mercedes Benz?
To reset the lights, start up your Mercedes-Benz and turn the steering wheel all the way to the right, then all the way to the left. Do this a couple of times. Turn off the engine. Restart. Brake Light Switch may cause BAS / ESP / ABS light to come on. It is the most common problem with Mercedes-Benz cars.
Can a flat car battery be saved?
If a battery is completely dead but has been revived by a jump start, there are ways to fully recharge your battery. The first is, as mentioned, by driving around. If that does not seem to work, however, car battery chargers can regenerate all of the charge into a battery.
Does a flat battery need replacing?
Car batteries contain several 2-volt batteries known as cells. If one’s not working, the battery will need to be replaced.
How do you keep a car battery from going flat when not in use?
If so, here are some things you can do to save your car battery when it’s not in use.
- 1) Use a trickle charger or battery conditioner.
- 2) Avoid turning your car on and then off again.
- 3) Avoid short journeys.
- 4) Drive your car for 15-20 minutes at a time.
- 5) Alternate trips if your household has more than one vehicle.
Are there any problems with the Subaru Forester battery?
2017 was even worse for the Subaru Forester in terms of battery problems. More drivers complained of these same problems including a weak battery, one that would not hold a charge, one that died frequently for apparently no reason.
Why does my new Subaru Forester not start?
Unfortunately it didn’t work, car still wouldn’t start. When CAA came to look at the car later, they couldn’t boost it either. They found that, yes the battery was low, but also the main fuse in the electrical circuit had been blown. They were able to short that fuse, and we could start the car.
When did my new Forester limited come out?
Just purchased a new 2019 Forester Limited less than 1 month ago. Yesterday morning I found the car completely dead, would not start. Seemed like a drained battery. This was 5:00am so I wasn’t going to knock on neighbors doors asking for a boost.
What’s the problem with the battery in a Subaru?
Part of the problem with this battery issue is that Subaru’s response has been not to acknowledge that there is a larger issue at play, instead they replace the dead batteries with new batteries and the problem continues.