What does it mean when your car says auxiliary battery malfunction?

Like the main battery, the auxiliary battery is charged when the engine is running. … When it can’t hold a charge the computer pops up that malfunction message.

Can you still drive with auxiliary battery malfunction?

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.

What does it mean auxiliary battery malfunction?

An auxiliary battery malfunction can cause your vehicle’s electrical systems and operations to display errors. These include your entertainment system, GPS, PDC sensors, radio, and start/stop functionality.

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.

Can I drive my Mercedes with auxiliary battery malfunction?

The main function of mercedes-benz auxiliary battery is to provide voltage to “stop start” function, so this function may not work until you solve battery malfunction. You can keep driving a car for while, but it is always recommended to fix any fault as soon as possible.

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What do auxiliary batteries 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. … And just like that battery, it lasts around four to six years.

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.

Can you charge auxiliary battery?

By connecting the positive terminals of both batteries, you can easily use your alternator to charge your auxiliary battery. Your electrical loads won’t drain your starting battery, and your auxiliary battery will only be charged when the engine is running, if you have an isolator.

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.

Can an auxiliary battery drain the main battery?

However, this requires balancing the needs of the battery against those of the electrical system. … 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.

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Is 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.

What does the auxiliary battery do in a Chrysler Pacifica?

If You own a 2018 Chrysler Pacifica, You may need to find Your auxiliary battery. This is a battery that exists as a sort of back up, secondary to the primary battery under the hood. This battery enables the vehicle components to continue working in the event of loss of charge from the primary battery.

What Mercedes has 2 batteries?

The Mercedes S550 is one model that has two batteries; one to start the engine, and another – called the auxiliary battery – to run the car.

What does the auxiliary battery in a Mercedes e350 do?

Your Mercedes-Benz E 350 has two batteries – a regular 12-volt starting battery and a smaller, secondary auxiliary battery used to keep all electrical components turned on. … If your system voltage becomes low, you can use the auxiliary battery to manage some of the more critical vehicle components.