CG100 Repair Mercedes 48V Hybrid Battery

Here is the tutorial on repairing the Mercedes Benz 48 volt mild hybrid battery.

 

01: 48V Battery Benefits
By using a 48-volt electrical system in new Mercedes-Benz vehicles, the car can be powered solely on the electrical system battery instead of using the drivetrain batteries. In fact, these drivetrain batteries can be removed altogether, making the vehicle safer overall because there aren’t dangerous amounts of electricity traveling through the car.

02: Device to repair 

CG100 Prog III programmer

 

03:  Model affected

2015 onwards Mercedes Benz W167 W205 W213 W222 etc

 

04: Symptom

Battery Malfunction, limits the output, car fails to start

1. Instrument cluster message 48 V on-board electrical system battery (G1/3) in yellow or red
2. Vehicle does not start

 

05: Common Fault Codes

B183349: There is an internal electrical fault.

B183371: Actuator is locked

B183384: There is a signal below the allowed limit

 

06: Causes

Collision accidents, battery drain, electrical short circuit etc., will cause the chip data on the battery management system (BMS) to be locked.

 

07: Solution

Replace the battery or modify chip data, then charge the battery to standard voltage

 

08: NOTE

check and confirm the vehicle is equipped with M256 or M264 engine computer.

Different engines have different data modification approaches.

 

09: Repair Guide

Remove and disassemble the battery

Locate IC chip 95M01

You can see the IC chip when you open the upper case of the battery. This chip controls the operation of the entire battery.

In CG100 software, select Programmer- 8 foot chip- 95M01

CG100 will show you the wiring diagram

Solder IC chip to BDM4 adapter and connect with CG100

Then read and save data.

Send the original data to CG engineer.

You will receive a modified bin file.

Write the new bin file to the battery module.

Install battery back to the vehicle and charge it to standard voltage.

Check the previous guide How to repair Porsche Cayenne Lithium Battey with CG100

The difference is that CG100 comes with built-in write data for the Cayenne battery. At Mercedes, you need to send original data to CG engineer to obtain modified data.

http://blog.obdii365.com/2022/03/07/repair-mercedes-benz-48v-hybrid-battery-with-cg100/

How to Change Benz W211 FBS3 Mileage with CGDI MB?

Here is the whole assist with instructions on w211 mileage correction using CGDI Prog MB Mercedes key programmer. The procedure can be applied to other FBS3 models as well.

 

Main steps:

First disconnect EIS cable and backup gateway data
Connect cgdi mb and correct mileage and it will show new mileage
Take EIS on bench and renew it then mileage will be 0 in EIS
Install EIS in car and connect it
Finish

 

Procedure:

Step 1: Backup gateway and change mileage

here is an example of W211.

Set up bench connection.

Connect CGDI MB with USB cable
Connect power cable
Connect CGDI MB with instrument cluster and EIS

Now we come to software operation
Run CGDI MB software
Read EIS data

always backup gateway data before the operation
Go to Gateway function

Read gateway EEPROM and save

Read gateway FLASH (chip 29F400 or 29F800) and save
Read flash operation takes a long time, make sure you have connected the power supply.

Then go to Mileage Repair function

Select dashboard-type W211 and Read mileage, it read current mileage 8864KM

Enter mileage (KM) you desired, i.e 11,111km and Write Mileage

Write mileage success. Remove fuse or disconnect battery.

Read mileage again. The mileage has been corrected.

 

Step 2:

After you finished step 1, install the dashboard back to car. Check if the mileage will return back.

If return back, you can renew your EZS, sometimes the mileage will reset 0 when you renew your EZS.

Tips: CGDI MB FBS3 function can stop most of the EZS mileage return back to the instrument. If it is not working then you renew your EZS.

 

NOTE:

If you try to write the Gateway files back when doing other chassis and get a message saying the CGDI MB cannot write to the gateway, use CG Pro to do that. Write back with cgpro. cgmb can not write this gateway file.

 

 

Related reading:

Repair Mercedes W205 FBS4 Mileage by CGDI MB without CAN Filter?

Mercedes GL400 X166 FBS4 Mileage Correction with CG100 and CAN Filter