Why did I choose the MB STAR C3

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Why did I choose the MB STAR C3

There is two parts to using the Mercedes Star Diagnostic tool, the first being the setup and the latter actually using it. As you can see above, their are a few leads involved to connect the Mercedes to the star machine.

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Why did I choose the Mb Star C3?

Owning 4 Mercedes and many others in the family, fault codes are very common and are difficult to uncover unless you own a Star Machine. The MB Star C3 can interact with cars from 1989 to now, which covers the majority of the cars I own. The ability to read troublesome stored codes and erase them once resolved is very useful and also saves money in the long run with the majority of independent garages charging £30-40 to scan your Mercedes.

How Hard is it to use the Mercedes Star Machine?

There is two parts to using the Mercedes Star Diagnostic tool, the first being the setup and the latter actually using it. As you can see above, their are a few leads involved to connect the Mercedes to the star machine.

*   Wire from ECU to the Multiplexor
*   Wire from Multiplexor to the Computer
*   Power Cable to the Laptop (It’s advised never to let the computer run out during diagnostics!)
*   Power pack if low battery that might die during the test

Once the wires have been connected up properly, start the iginition and you should wait until you see a lock appear in the bottom right corner of your computer (near internet signal). Once the lock is present, the computer is connected to the car, therefore start up the DAS/Xentury software and do the following:
*   Find your car using the menu provided (Car -> E Class -> W210 etc)
*   You will then be greeted with a popup notifying that the multiplexor is attempting to connect
*   Once connected, its fairly straight forward – You can perform tests or go into individual units
*   Using F1, F2 and F3, you will be able to navigate through stored fault codes and removing them with the F9 key
*   If faults are not removing, its best to print out the full test (button bottom right), which will contain unique MB Codes to show a mechanic

The Star machine enables you to find a problem, fix it and confirm that it is fixed by erasing the issue and then running another test. If you are feeling confident, you may feel like running some more complex tests i.e. Compression test. I had issues with the fuel injectors in my 320 CDi, therefore I performed a compression test, which was spot on but the second test was the “leak” test, which showed two injectors were faulty.

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Buy Mercedes Star Diagnostic Computer Tool

The complete kit can be bought from just £600, which includes all of the wires for the latest Mercedes Benz’s out and include the computer with necessary equipment. Of course, the price seems a lot, but so does paying £40 each time to have a diagnostic via an independent garage. You are able to do this yourself with limited knowledge aswell as charge friend to clear their faults. You can buy the Mercedes Star Machine Bundle straight from OBD2TOOL.

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Just because a star machine is marketed as the “go to” Mercedes error code scanner, it does not mean you cannot use any other type of scanner.


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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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