Author Archives: wp-admin

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Unlock SD Connect C4 by PCB Modification

“If your Mercedes-Benz Star diagnosis SD Connect c4 is locked, do not need to buy a new set and just change this chip is ok.” said a Mercedes owner with MB SD C4 diagnostic tool.

Here is the customer solution to unlock MB Star diagnostic tool sdconnect c4 mux.


PCB modification procedure:

1- Carefully open the sd connect multiplexer

2- Check whether some part is easy broken

MB SD Connect C4 printed circuit board in a good condition should be:


2016-sd-connect-compact-4-pcb-2 2016-sd-connect-compact-4-pcb-3 2016-sd-connect-compact-4-pcb-4 2016-sd-connect-compact-4-pcb-5


3- Possible occasion:

Maybe batteries leaked and damaged the PCB.
4- Blow the chip marked with a red circle by a electric hair drier


5- Disassemble the chip

6- Write the program to a new chip

7- Install the new chip to the PCB, then assemble PCBs into SD connect c4 mux

8- Start SD c4 mux

9- Connect MB SD C4 multiplexer to the laptop

10- SOLVED! And work like a charm, as a good SD Connect C4 at obd2tool.

If method above cannot help you out please contact OBD2TOOL customer service.

Hope this helps!

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Xentry error 2221-45 No access authorization solution

One of customer had the Xentry error 2221-45 No access authorization when running Mercedes MB SD Connect C4
2016.07V Xentry diagnostic software. Here is the final solution provided by engineer.


(2221-45) No access authorization for XENTRY Diagnostic was found on the server. You must contact the User Help Disk.


Solution I from mbstarshop engineer:

If you running Windows 7 hard drive, then

Browse to C:\Mercedes-Benz\Xentry\fusoko\eclipse\plugins, delete com.daimler_xentry.diagservice_1.6_0.2016.07181047 file.

2. If you running Windows 8 hard drive,then

Browse to C:\Program Files\Mercedes-Benz\Xentry\fusoko\eclipse\plugins folder,
Delete com.daimler.xentry.diagservice_1.6.0.201607151427 file

Problem has been solved.

Solution II from a user

Software version: Xentry 2016.05

In folder
C:\Program Files (x86)\Mercedes-Benz\Xentry\fusoko\eclipse\plugins


Then paste in
from 2221 052016 folder

Solution III from another user

Software version: 05.2016 Xentry

Free download Xentry-2221-45-fix.rar:!Ip1GkQhR!hHakXl1U1Q5SEE_5NlIZcfSNRE_2CKDJSL9OLXTexYw

(2 fix)

Solution IV with lots of thanks & likes in a forum

Software version: Xentry 2016.5

replace the file call com.daimler.xentry.diagservice_1.6.0.201605121225.jar in the folder
c:\program Files(x86)\Mercedes-Benz\Xentry\fusoko\eclipse\plugins
with the attachment below