How to solve MB STAR C3 DAS Fault (1.1)-1.501.9504

I have had a Mercedes diagnostic machine Benz star c3 for a while and i decided to try and make it work, but every time i try to communicate with the car i get  an error message saying :

Fault (1.1)-1.501.9504
Initialization of diagnosis multiplexer failed. Possible causes: The link between the diagnosis multiplexer and the diagnostic socket is interrupted. The link between the diagnosis multiplexer and the diagnostic unit is interrupted. The voltage supply at the diagnostic socket (circuit 30 and (or) circuit 31) is faulty.


Error codes analysis:

error code 95xx: C3 mux settings is committed
error code 9551: means no C3 mux is connected
error code 9504: means Star C3 is connected and error in mux
error code 9500: means C3 is connected but error in COM settings to COM2
error code 99xx: means C4 mux settings is committed

So the error is 9504 means mux is read by software and mux is burned

But C3 mux is working on 3 main communication objects:
1- CanBus
2- K-line
3- L-line

your mux may still work if one circuit is burned like CanBus circuit burned but still you have other 2 working on K-line and L-line
Detailed possibilities of unsuccessful communication:

1 COM port setup improperly or broken COM serial on the laptop
2 New models that old STAR C3 cannot support
3 Something wrong with C3 diagnostic mux
4 Something wrong with cables

Thus, Obd2tool advice is to check your mux on other laptop, OR you may find your COM serial on your laptop is broken or do opposite check other mux on your laptop to find what is wrong. if all is ok, that is two possible occasions:

1 the model cannot not be supported by Star c3 and you should buy SDconnect C4
2 the software can not run ok and you can try new V2018.9 MB Star C3 Software



Mb Star C3 Pro Red Interface With Seven Cable For BENZ Truck and Cars

Mb Star C3 Pro With Seven Cable For BENZ Truck and Cars Update To V2018.9


Top 4 Reasons to Get MB Star C3 Pro:

1. Newest Software: V2018.9 (HDD with Win8 System No HHT)
2. Multi-Language: English, French, Spanish, Portuguese, Italian, Japanese, Ruassian, Croatian, Czech, Danish, Dutch, Finish, Greek, Hungarian, Korean, Polish, Romanian, Swedish, Turkish, Chinese
3. MB Star C3 has past truck test. It can used to do benz trucks 12-24V
4. Z-TEK USB1.1 to RS232 Convert Connector is included in the package now,easier for you to use Mb Star C3 on pc without COM port
Mb Star C3 Functions:

1.1989~up to now Car, Bus, Truck, Sprint, Smart ;
2.All electric system Diagnostic;(Do not include flash code)
3.reading trouble code
4.erasing trouble code
7.component testing
9.information consultation
10.component location diagram
11.wiring diagram

Mb Star C3 New Features:

1.This version of MB STAR C3 can fit all computers,it is not only limited on IBM T30,provide great convenience to customers.It has one hard disk contain DAS and WIS system.
2.With a 7 meter RS232-RS485 cable,provide more convenience to garage when diagnose.
3.Every hard disk has it’s special number,have self-test function.Just give us the self-test report and the number,we will find out what’s the matter with this tool,avoid the shipping charge when this tool need fix.Great improvement!
4.What is most important, this C3 has past truck test.It can used to do benz trucks.

Mb Star C3 Testable System:


Product Software Includes:

1.D-A-S: the automatically Diagnosis Assistance System ,Concise interface and straightforward operation with IBM high-quality computer can realize the quick and accurate code reading and the whole car system testing
2.W-I-S net: Workshop Information System Supply the whole view of the wiring diagram in a car,component location diagram and maintenance method. What you do is to enter the chassis number, and then you will get the manufacture data, engine configuration and the car model -all in detail. : Electronic Parts Catalog
4.ST Finder:Part location finder
5. STAR UTILITIES : the movement management system and self-test

MB Star C3 Supported Vehicle List:

Passenger Car Support List:
A(176), A(169), A(168), B(246), B(245), CLC(117), C(204) C(203), C(202), 190(201), E(212), E(211), E(210), 124(124), S(222), S(221), S(220), S(140), S(126),
E(207), CLK(209), CLK(208), CLS(218), CLS(219), CL(216), CL(215), CL(140) SLK(172), SLK(171), SLK(170), SL(231), SL(230), SL(129), SL(107), SLS(197),
M(166), M(164), M(163), G(463), G(461), E(212), E(211), E(210), 124(124), S(222), S(221),S(220), S(140), CLK(209), CLK(208), CLS(218), CLS(219), CL(216),
CL(215), CL(140), SLK(172), SL(231), SL(230), SL(129), SL(107),SLS(197), M(166), M(164), M(163), G(460), GL(164), GLK(204), R(251)

Van Support List:
MB 100(631), T1, SprinterIII, SprinterII, SprinterI, Sprinter900, Citan, Vito(639), Vito(638), V(638),  Viano(639), T2, Vario, Vaneo(414)

Truck Support List:
Actros963/4, Actros2,3, AtegoIII, AtegoII, AxorII, Eonic, Zetros, Actros, Atego Light, Atego Heavey, HPN M96, Atron, HPN M2000, SKL, FSK, Further model series

Unimog Support List:

Bus Support List:

Super Sports Car Support List:

Mb Star C3 Package List:

1x 16Pin OBD II Cable
1x 4Pin Cable
1x 38Pin Cable
1x 14Pin Truck Cable
1x COM Cable
1x RS232 to RS485 Cable
1x Serial Adapter Cable
1x Hard Disk
1x Z-TEK USB1.1 To RS232 Convert Connector


How to Make Your Star C3 Work as MB SD Connect C4

Here introduce you two ways to make your Benz star c3 Pro (Quality Version) work as MB SD Connect C4.


Convert MB Star C3 PartD (C3) to SD connect (C4), download Convert_C3_to_C4 tool.rar, and run it on your MB star c3 Diagnosis software. Then set local-connect IP as: and the wireless IP:

Replace the attached file (cal.sli) in local disk F:/ F:programmeXentrybinllist and make it Read Only after running MB Star C3 Xentry software which has connect with your SD connect C4 Multiplexer, then replace the download Cal sli. (If you are MB Star diagnostic technician, you also can modify the cal. sli by yourself.)

Afterwards you have to do following changes to convert the PartD MB Star C3 to SD Connect C4 .

1. Find out F:ProgrammeDASbin folder in Local Disk F:/ and locate Cal.ini file, follow below steps

PartD (C3) Mux:


SD connect (C4) Mux:

PLATFORM=PART_T (or optional _W for Wi-Fi ONLY communication)

2.Find out HHTWin.ini file which located in the windows MAIN folder, make it as below:

PartD (Star C3) Mux:


SDconnect (C4) Mux:


Finally, please configure serial port, LAN network or WIFI network (if you using WIFI Benz diagnostic system)

Now please test your Benz diagnostic tool mb star c3 pro and enjoy

Any further question or problem,please kindly contact our customer service

How to activate the MB Star C3 software

Q: How to activate the Benz star c3 software?

A: After the installation in the VMware. There will be a file on the desktop named “How to setup your Star C3″.
Please read the file carefully. And provide us your ID for us to calculate the password. You can activate the software with this password.


Q: How to change language of MB Star Diagnosis MB Star C3?

A: First choose the left side down button to setup (which mark red arrow on the pic),then click lanuage to change the one you want.



MB Star C3 V2015.9 up Multiplexer Initialization Failed Solution

Here is the engineer solution to Mb Star C3 V2015.9 up DAS Xentry multiplexer initialization failed problem.

Error message:

Initialization of diagnosis multiplexer failed.

Possible causes:

The link between the diagnosis multiplexer and the diagnostic socket is interrupted.

The link between the diagnostic multiplexer and the diagnostic unit is interrupted.

The voltage supply at the diagnostic socket (circuit 30 and (or) circuit 31) is faulty.


When using SDconnect,check the connection status using the Toolkit.


1. First check if you use the correct software for Star C3 not SD Connect C4, you do not modify software by yourself and it passes self-test.

If all these are okay, replace the Config file in c:\program\mecredes-benz\config

Config file!vhFEXBiL!jeFN5y38eCEH3ZitnQ2lvOGKBn3hJTWb4KsZ70I537k

2.If still not work, check device and vehicle communication

3. Otherwise send your MB Star C3 and software back to repair.

Using MB Star C3, C4, SD C4 to do online SCN coding

A customer asked me that if it is possible to do program injectors and gear resetting with his MB Star SD C4 diagnostic tool for the following cars:
E 320 cdi year 2006 W211 224 Ps v6
C 220 cdi Year 1999 w202 125 Ps
C 220 cdi Year 1998 s202 125 Ps

The answer is yes. but it requires the MB Star tool to open SCN coding function. As you can see, there is a “tips,, option in SD C4 software, which usually is not available. You can also find this function in Benz star c3 and MB Star C4 software interface. This is the SCN programming function. It can be used only after you purchase account and password for the function. Here are steps on buying and using this function.

How to get SCN coding function:
1.Purchase online SCN coding service.
2.Provide your order number of the SCN coding service to OBD2TOOL.COM customer service to activate this function.

How to use SCN coding function:
1.Prepare MB Star SD C4. a laptop. Teamviewer and the cars that you are going to do coding or resetting.
2.Select car model and system that you want to program, such as headlight XALWA-L.
3.Select CONTROL unit adaptations.
4.Select offline program (CONTROL MODULE PROGRAMMING) then (SCN coding).
5.Run teamviewer and enter teamviewer id and password
6.Login server (DALMLER)
7.Login server and finish SCN coding.

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