BodyB183213

Serious

Severity: Serious - have it checked soon

The 48V on-board electrical system has a malfunction. Thermal Propagation Event.

1 brand affected · Description from Mercedes-Benz data.

Key terms: Control module: a small computer that runs one part of the car

Safety: This code relates to a battery thermal runaway or thermal propagation event. An overheating or damaged high-voltage battery can catch fire and release dangerous gases.

1What it means in plain English

A body system has a fault. Depending on the make, this range can include airbags and seat belts, windows, locks and climate control, and also charging, brake, oil or coolant sensors.

2Common causes

Wiring or connector fault
Faulty sensor or switch
Water or corrosion in a connector
Control module fault
Low battery voltage

3Can I drive?

Serious · drive with care

Stop safely away from buildings and people - battery overheating can lead to fire. Do not charge or drive. Have the vehicle recovered.

This page gives general information. It is not professional advice. For a definite diagnosis and a repair quote, ask a qualified mechanic to inspect the car.

4Brand data 1

Brand	Code	Description	System
Mercedes-Benz	B183213	The 48V on-board electrical system has a malfunction. Thermal Propagation Event. Brand	Body

Legend: SAE is the generic J2012 description; Brand is text taken from that manufacturer’s data. Manufacturer rows keep the wording and language of the source data, and non-English text is tagged so screen readers pronounce it correctly.

5Related codes

Browse Bxxx codes or B183xx codes.