What Does It Mean When My Mercedes Says Auxiliary Battery Malfunction

baydiagnostic 86 views 25 slides Dec 02, 2022
Slide 1
Slide 1 of 25
Slide 1
1
Slide 2
2
Slide 3
3
Slide 4
4
Slide 5
5
Slide 6
6
Slide 7
7
Slide 8
8
Slide 9
9
Slide 10
10
Slide 11
11
Slide 12
12
Slide 13
13
Slide 14
14
Slide 15
15
Slide 16
16
Slide 17
17
Slide 18
18
Slide 19
19
Slide 20
20
Slide 21
21
Slide 22
22
Slide 23
23
Slide 24
24
Slide 25
25

About This Presentation

If your Mercedes displays an error message like “Auxiliary Battery Malfunction”, don’t wait or assume that the message will go away. Visit a nearby car repair shop so that the mechanic can determine the reason behind it.


Slide Content

What Does It Mean When My Mercedes Says Auxiliary Battery Malfunction?

The appearance of the "Auxiliary Battery Malfunction" message simply means:- "Go get your Mercedes auxiliary battery checked - it's probably dying".

What’s an auxiliary battery, you asked?

Well, that’s what we will discuss next.

A Short Note On Mercedes’s Auxiliary Battery

In a nutshell, an auxiliary battery is a backup for the main battery.

It essentially powers the following parts:- Radio Blind spot assist Lane keep assist GPS PDC

Let's move on to the reasons why the "Auxiliary Battery Malfunction" message may appear.

Dying or weak auxiliary battery

The most common reason the “Auxiliary Battery Malfunction” message will appear:- “is due to a weak or dying auxiliary battery”.

So, check the auxiliary battery soon after you see an error message like this.

Failure of the voltage regulator

This may also activate the “Auxiliary Battery Malfunction” message in Mercedes.

Also, a faulty voltage regulator can damage the main battery.

So, make sure that the voltage regulator of your Mercedes is in good working order.

Bad primary battery

It’s the primary battery that supplies electricity to:- The ignition system Starter motor And, other crucial electrical appliances

And, yes… If it goes bad, your Mercedes will display “Auxiliary Battery Malfunction”.

Electric short circuit

Short circuits can cause irreversible damage to a car’s electrical system.

If your Mercedes has an electric short circuit, it may show an "Auxiliary Battery Malfunction" message.

Final Thought

If your Mercedes displays an "Auxiliary Battery Malfunction" message, don't look away.

Find out what triggered an error message like this.

BAY DIAGNOSTIC https://www.baydiagnostic.com/ /BayDiagnostic/