Update the Firmware SDconnect MB C4 and MB C5

[CarMan]

Update the Firmware SDconnect MB C4 and MB C5

Step 1: Prepare 6 AA batteries 1.5V.

MB SD C4 (Item No.SP-100D) and SD C5 (Item No.SP255) require 6 AA batteries, but DOIP MB SD C4 PLUS (Item No. SP100-E) does not require batteries for firmware update.
Be sure to supply power through the OBD2 port for SDconnect during the update process.


Step 2: Remove the protective back cover and you will see where the batteries are installed.


Step 3: Connect power via OBD2, connect the LAN port to the laptop, and then open SDconnect Toolkit.


Step 4: Run the update and wait until it completes successfully.


Another case: If SDconnect Toolkit gives an error message: "SDconnect battery voltage too low 645" or "Check batteries".

- Cause:

+ You don't have AA batteries.
+ The power/charging circuit is damaged.

- How to solve this problem:

+ Find a file named "toolkit.ini". Go to this path "C:\Program Files (x86)\Mercedes-Benz\SDconnect Toolkit\bin\toolkit.ini".
+ Two line search command:

MinUpdateVoltageVBatt=7200
MinUpdateVoltageVExt=11000

+ Let's change the following lines so that the supply and/or battery voltage is lower than the actual voltage (setting them to zero is sufficient).

Original/Edited:

MinUpdateVoltageVBatt=7200
MinUpdateVoltageVBatt=0

MinUpdateVoltageVExt=11000
MinUpdateVoltageVExt=0


Finally update and wait until everything completes successfully.
Good luck!

 

[jg.abaitua]

Instead of asking, I just opened my Chinese SD C4 and unfortunately found that it is not ready to install any batteries and does not even look like the one in your photos.

 

[Mersovod]

To prevent the C4 from malfunctioning, always remove the batteries from it when using it, and never connect the C4 to a vehicle without a charger or with a defective battery. A breakdown occurs when the supply voltage drops when the device is loading! In all other cases, no update is required.