Mercedes Benz MB Star C3 vs C4

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Mercedes Benz MB Star C3 vs C4

Mb Star C3: It requires a laptop so that you can troubleshoot your Mercedes-Benz via Xentry software. While on paper it is slower than MB Star C4, it has proven to be a very reliable and robust scanner that is not plauged with WiFI connectivity issues like the Star C4.

MB Star C4 is the latest Mercedes-Benz wireless multiplexers that can connect to your PC via wireless connection. Being the latest Diagnostic Scanner for Mercedes-Benz it works faster, once you resolve any connectivity issues that is.

Frequently Asked Questions

What is DAS? – Diagnostic Assistance System – This is the full diagnostic system for Mercedes-Benz vehicles. All functions for diagnosis including reprogramming, configuration, initialization, fault diagnosis and guided diagnostic tests are contained within DAS.

All control unit software (reprogramming calibrations) is contained within the DAS software which is distributed monthly via DVD media.
All access and functionality required in regard the configuration via SCN Coding and/or CVN Coding is covered.

What is WIS-NET? – Workshop Information System – This is the complete workshop information system as developed by DaimlerChrysler for use in the servicing of Mercedes-Benz vehicles. Contained within are installation instructions, procedures, functional and technical specifications. There is some linkage from certain procedures in DAS to respective documents in WIS.

What can Mercedes Star Diagnostic Tool do? The system offers total diagnostic coverage of all engine, chassis and body systems:

Reading and re-setting of diagnostic trouble codes (DTC)
Real-time reading of dynamic data
Full component activation clearing and re-setting of adaptation values
Coding of all engine, chassis, body and instrumentation modules
Key configuration
Procedure for fitting Mercedes- Benz accessories through the D2B ring and MOST bus
Total ASSYST / ASSYST + control (Active Service System) to update on board service history

What is Workshop Green Key? This is a unique one-time key from the factory which is necessary in certain situations such as:

Disabling a key track
Replacing the ECU
Replacing security related control units
Replacing EIS

Typically the workshop key and EIS must be ordered togheter and the green key is used to perform the final programing of the EIS.

What does it mean MARRYING  a VIRGIN ECU and EIS? The ME (ECU=Engine Control Unit)  and  EIS (Electronic Ignition System) control module are electronically permanently married to each other after 40 engine starts. There is no factory procedure to undo this. This means that a used engine EIS or DAS control unit cannot be used on another vehicle. A new control unit can be installed for testing provided the 40 engine starts are not exceeded. Note that the new control unit must be variant coded before it can be used. If the 40 engine start cycles are not completed successfully resetting the counter to 0 (removing the version coding) is possible if  you disconnect the power from the ECU for at least 45 minutes.

What model years does Star Diagnostic Scanner work with? The Star Scanner should work on cars from 1989 up to 2015 for Mercedes Cars, Buses, Trucks, Sprinter Vans, Smart cars, Etc.
What can I do with obd2tool.com Star Diagnostic SD Connect Scanner C3 & C4?

Reading/Erasing Trouble Codes
Read Live Data
Adaption of Modules
Coding/Programming of Modules
Component Testing
Maintenance Information Consultation

What is Xentry? New software released by Benz Company after 04/2009 by diagnosis new cars. WIS.net : Workshop Information System EPC.net: Electronic Parts Catalogue STAR UTILITIES: the movement management system and self-test DAS: the automatically Diagnosis Assistance System ST Finder 2008: Part location finder

What is Smart TAN Code? It openes special function in DAS program with Smart cars 450/451/452/454 Developer model: Mercedes-Benz engineer mode, remove limitations and open more functions.

What is Benz Disassembly system? Video lessons to teach you how to remove each part from Benz cars with details order steps.

Which control units can MB Star Diagnostic Scanner with Xentry troubleshoot?

Engines (All Gasoline & Diesel Systems)
Transmissions and Electronic Selector Modules
Airmatic and Active Body Control Suspension Systems
Traction Systems: ESP / ASR / ETS / ABS / BAS / SBC braking systems
Supplementary Restraint Systems (SRS) / Airbag, All body modules OCP / UCP / LCP / SCM / SKF / KFB / RCM / DCM’s
Drive Authorisation System
Sam (Signal Acquisition) Modules
Electronic Ignition System (EIS)
Pneumatic System Equipment and ATA functions
Air Conditioning / climate control Systems
Instrument Cluster
Tyre Pressure Control
Parktronic System
Keyless Go
D2b Command & Audio Gateway (D2B and MOST networks)
TV Tuner
Headlamp Range Adjustment
Seat Electronics
Rvc, RST & Vario Roof modules
Automatic Clutch System ACS
M-Class Body Modules (AAM / EAM / DAS / SEM / VG Transfer Case)
Assyst & ASSYST + systems


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Star C3 Part D & New MB W222, W217, W205 etc (Discuss)

A good thread with posts: Part-D MUX (a.k.a Star C3) and W222/W205…

Hey dears

perhaps some of you have some insights on this: While we all know that the new model series like W222, W217, W205 etc have on board ethernet routed to the OBD socket, and the Benz diagnostic tool SDConnect is Ethernet/DOIP capable, the diagnosis still seem to be fully possible via D-CAN (pins 6,14 on the OBD socket). For instance, third party tools like BOSCH KTS and the BOSCH CDR (that we use for pulling crash data) do not communicate over Ethernet, they connect to several modules (well some 70% of what is in the car due to 3rd party limitations) via CAN, and they do it allright.

So what is the real reason for Part-D mux not communicating with these model series, could this be just a planned “programmed obsolescence” so the old units get retired faster than they really should?

Perhaps it would be possible to edit vehicle definitions so the old communication platform would still serve for these cars?

I have several Part D muxes, some original, some clones, and some of them work really, really reliably. Learning that purchase of a cloned MB Star C4 that would be as reliable as this is next to impossible, i am thinking about possible workarounds. Since it does not look like actual communication architecture limitation. Anyone?

 RE: Part-D MUX (a.k.a Benz star c3) and W222/W205…
There is nothing planned it is simply technology development. In time when was used PartD there was no ethernet/DoIP in the cars so was not needed have this technology in diagnostic device. Then came new technology and was build new communication hardware. For new technology is needed new technology that′s all. It is the same like car from year 2000 and car from 2015.

RE: Part-D MUX (a.k.a Star C3) and W222/W205…
The only thing is, that Part D is not supported in newer Xentry and Vediamo or dts monaco software.
This part would work also with the cars for CAN Bus only.

RE: Part-D MUX (a.k.a Star C3) and W222/W205…
(10-05-2017 12:45 AM)laco210 Wrote:
There is nothing planned it is simply technology development. In time when was used PartD there was no ethernet/DoIP in the cars so was not needed have this technology in diagnostic device. Then came new technology and was build new communication hardware. For new technology is needed new technology that′s all. It is the same like car from year 2000 and car from 2015.

Well that would be true if the newer vehicles would run ONLY in the DoIP mode/lacking CanBUS. But actually they DO have ordinary can BUS and even the documentation (WIS) states, that the diagnostics still take place using the D-CAN!

But guess what. We never know until we test ourselves.

I did a little experiment. I have installed a VOLVO DICE (capable of being a J2534 pass thru) drivers and configured that in Xentry (using the provided ptd_select program). Result – fully running diagnostics on a CAN (YES IT IS A PASS THRU CAN because DICE can’t do DoIP) on a 2016 S-Class.

I will test more interfaces and report. If that turns to be sufficiently reliable, i will stick to it and forget about other interfaces.

RE: Part-D MUX (a.k.a Star C3) and W222/W205…
Most of our SDconnect tools are not DoIP capable but can still do W222 and similar MB models. That is for the diagnostics tasks. They cannot do Telematics updates or similar that run through the IP port.

The issue with C3/PartD and these new cars is not CAN but support for UDS protocol.

RE: Part-D MUX (a.k.a Star C3) and W222/W205…
(10-05-2017 08:42 PM)DBmhh Wrote:
Most of our SDconnect tools are not DoIP capable but can still do W222 and similar MB models. That is for the diagnostics tasks. They cannot do Telematics updates or similar that run through the IP port.
The issue with C3/PartD and these new cars is not CAN but support for UDS protocol.

That would make sense and perfectly explains why i am getting full diagnostics using Volvo interface in J2534 mode that has CAN but also supports UDS (in fact, isn’t it rather a feature of the driver than the box itself?)

Anyway, quite happy with what i;ve found and if anyone’s interested i will give info on what tools, versions, setup etc was used to make this work.

RE: Part-D MUX (a.k.a Star C3) and W222/W205…
(10-05-2017 08:42 PM)DBmhh Wrote:
The issue with C3/PartD and these new cars is not CAN but support for UDS protocol.

Bud, D3 supports UDS protocol. For example Sprinter 3 up to 2014 model year. Delphi CRD2 is UDS.
(10-04-2017 11:02 PM)mikepl Wrote:
Hey dears
So what is the real reason for Part-D mux not communicating with these model series, could this be just a planned “programmed obsolescence” so the old units get retired faster than they really should?

The only reason is that MB discontinued its support.

RE: Part-D MUX (a.k.a Star C3) and W222/W205…
(10-08-2017 08:59 AM)efka Wrote:
Bud, D3 supports UDS protocol. For example Sprinter 3 up to 2014 model year. Delphi CRD2 is UDS.

“Supports UDS” or “only UDS”? Why does C3 not talk to a 2014 Sprinter CDI control unit when it does talk with the rest of the car?

How did you check C3 supporting UDS and really talking to the control unit with the UDS protocol? The control unit most likely accepts both when the 2014 only accepts UDS.

RE: Part-D MUX (a.k.a Star C3) and W222/W205…
The only difference PartD has no DoIP.
All other ECU protocols are supported.

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