Can I drive my car with a failed auxiliary battery? Is it safe to drive with auxiliary battery malfunction? The answer is yes and no, it is always not good to drive with any kind of malfunction on your vehicle as you don't know how it will affect car's performance or other functions. Click to see full answer.
Can you drive with a bad auxiliary battery?
14/04/2020 · Is it safe to drive with auxiliary battery malfunction? The answer is yes and no, it is always not good to drive with any kind of malfunction on your vehicle as you don't know how it will affect car's performance or other functions.
What are auxiliary batteries used for in cars?
05/10/2021 · Can I drive my car with a failed auxiliary battery? Of course, you can drive your Mercedes even with a failed or malfunctioned auxiliary battery. This is because Mercedes has two batteries and the battery used to run the vehicle is the main one. So, even though you won’t be able to utilize functions such as start/stop, you can still drive ...
What does it mean if my Mercedes has no auxiliary battery?
04/01/2016 · When the main battery is depleted, the auxiliary battery will kick in and continue to charge the car as needed. Just like the main battery, eventually the auxiliary battery will start to have issues and will need to be replaced. Usually, these batteries will give you fair warning that they are in need of replacement.
What happens when the auxiliary battery in a car dies?
01/01/2016 · We don’t advice that you continue to drive the car with a failed auxiliary battery. It is a concern if the main battery fails. Several Mercedes-Benz models use SBC (Sensotronic Braking System) brakes or brake by wire.
Is it safe to drive with auxiliary battery malfunction?
Symptoms. When the main battery dies, the car won't start. The car starts when the auxiliary battery dies, but an auxiliary battery malfunction appears on the dashboard. In most cases, the car runs and drives fine even with a bad auxiliary battery.
What happens if auxiliary battery dies?
Having a battery that is dead will result in you not being able to crank the car when needed. Usually, the car will run once it has been jumped off, but will quickly die back out after it is turned off. ... Once the alternator stops, the cells in the battery will not be able to hold a charge and will cut off.04-Jan-2016
Is an auxiliary battery necessary?
For most diesel engines, having two batteries is essential due to the number of components that need power. ... When the main battery is depleted, the auxiliary battery will kick in and continue to charge the car as needed.13-May-2019
What does the auxiliary battery do?
The auxiliary battery is a backup for the main battery. It does a number of jobs depending on what model of car it's installed in. These range from powering electrical accessories like the radio/infotainment to operating the engine stop-start system.07-May-2021
Can you drive a Mercedes without the auxiliary battery?
Is it safe to drive with auxiliary battery malfunction? The answer is yes and no, it is always not good to drive with any kind of malfunction on your vehicle as you don't know how it will affect car's performance or other functions.08-Jun-2019
Can an auxiliary battery drain the main battery?
other accessories continue to draw power when the engine is off. ... However, simply wiring extra batteries into a vehicle's electrical system can allow auxiliary batteries to drain power from the main battery, inhibiting engine starting and other essential functions.09-Dec-2020
Does the alternator charge the auxiliary battery?
Every vehicle has an alternator. ... You can easily use your alternator to charge your second (auxiliary) battery simply by connecting the positive terminals of both batteries so that they're in parallel.
What does AUX mean on a alternator?
An auxiliary wound excitation system on an AC alternator works by having a separate second winding embedded into the main stator winding. This winding is used to independently power the AVR.15-Jun-2020
How much does it cost to replace an auxiliary battery in a Mercedes?
On average the auxiliary battery replacement will cost between $200 and $300 with parts and labor.
How long does an auxiliary battery last?
Properly cared for and maintained, you can expect anywhere from 18 months to 3 years of life from an auxiliary 12-volt battery. Much will depend on frequency of use, and how well the battery is protected. Rough roads can cause the cells to break down, reducing the lifespan.13-Jan-2016
How do you test an auxiliary battery?
4:1911:22Mercedes Auxiliary Battery Test and Replace Fix - YouTubeYouTubeStart of suggested clipEnd of suggested clipYou should have this tool in any case it's good to test a lot of different things not just forMoreYou should have this tool in any case it's good to test a lot of different things not just for batteries. But today i'm going to go ahead and use the multimeter to test the battery voltage.
Why do Mercedes have two batteries?
Why do Mercedes-Benz vehicles have two batteries? Two batteries are needed because it has too many electrical demands. The main starting battery is in the trunk and the secondary battery is located under the hood, near the windshield. ... The Mercedes auxiliary battery provides voltage to the stop/start function.
What is an auxiliary battery?
Auxiliary battery is responsible for running and powering additional accessories in the car such as stop go function and many other, once it detects failure none of these functions will work.
How to check if a Mercedes battery is used?
So the first step is to check which battery is used in your mercedes by opening a hood (bonnet) and trunk (boot), in the trunk this part is usually located nearby fuses if after inspecting these two places you weren't able to locate small auxiliary battery it means your car uses voltage converter. Auxiliary battery is responsible for running ...
Does an auxiliary battery affect the car?
The auxiliary battery does not affect the car’s mechanical functions. If you are unsure, you should be able to diagnose the fault with an OBD fault code reader. The most important thing is that we now know the issue and what to look for in the car, second thing on the priority list is to find out which auxiliary battery is fitted ...
What is the dual battery system in Mercedes?
Most of the cars made by Mercedes Benz today use a dual-battery system that consists of the primary car battery and an auxiliary battery.
How to check which battery is used in a car?
To check exactly which battery variant is used in your specific vehicle, you will be required to open the trunk and hood . Inside of your trunk you will find fuses if you don’t see a small auxiliary battery nearby, your vehicle does not use a voltage converter.
Where is the Mercedes auxiliary battery located?
In newer model Mercedes-Benz vehicles, the Mercedes auxiliary battery is located inside of the front footwell of the passenger seat located near the top. To access the battery, you will need to completely detach all connecting parts in addition to removing the carpet so that you can gain possession of the battery.
Can you replace an auxiliary battery yourself?
However, keep in mind that if you decide to attempt an auxiliary battery replacement yourself, you are fully responsible for the outcome of the job whether it be a success or a failure. If you attempt the repair and it does not resolve your issue, you might want to bring your vehicle to us, The Battery Shop for assistance.
What does the warning message on the dashboard mean on a Mercedes Benz?
Many Mercedes Benz owners have noticed that they will sometimes get an occasional warning message on their dashboard stating “auxiliary battery malfunction” which can be quite scary especially if it happens while you’re actively driving.
How long can you drive after noticing an auxiliary battery?
Generally, it is only acceptable to drive your vehicle for about 100 km after you begin to notice issues with your Auxiliary battery as a standard safety precaution to avoid any serious problems.
Can you drive with an auxiliary battery?
It’s not recommended to drive when you’re experiencing issues with your auxiliary battery. However, it does not put you in any immediate danger as long as you don’t notice a decline in the overall handling and performance of your car.
Why is CCA important for ICE only cars?
CCA is, technically, only important for straight up ICE only cars because the starter motor has to turn the motor over so it can start.
How to tell if a 12V battery is charging?
A simple voltmeter plugged in the 12V outlet in the center console will let you monitor the charging operation. When you first enter READY mode, you'll see 14+ volts, meaning the 12V battery is charging. Then, after several minutes, the voltage will drop to 12-13 volts, meaning the battery is recharged.
Can 240CCA battery fail?
But just seeing 240CCA doesn't prove by itself that the aux battery is about to fail. A simple test you can do at home, if you have a multimeter, is to take it for a 30-minute drive or thereabouts and then check the battery voltage the next morning to see if it held its charge.
Why is CCA important?
CCA is, technically, only important for straight up ICE only cars because the starter motor has to turn the motor over so it can start. Because the starter motor is replaced with the motor-generator in the Prius, the power comes directly from the hybrid battery.
Can a 12V battery damage a battery?
NO, a failed 12 V will not "damage" the HV battery. It might cause it to not fully charge for a while. It might cause some codes to come up that LOOK like the HV battery is failing when it really isn't. 4 years is on the low end of expected battery life so I suggest getting it tested at some other place.
