Mercedes fault code reader?
 

Hey guys I wanted to get a fault code reader for my mercedes I have a 92 s600 can anyone tell me if this is the right one to buy? If not maybe someone can link it to me? Thanks a bunch.


eBay Motors: Mercedes Benz S~E Class Code Reader Scanner OBD2 c/clk (item 330065965828 end time Dec-29-06 10:12:20 PST)



or what about this one??


http://cgi.ebay.com/ebaymotors/Mercedes-Diagnostic-Tool-Code-Reader-400e-S500-SL600_W0QQitemZ180067199080QQihZ008QQcategoryZ43989QQssPageNameZWDVWQQrdZ1QQcmdZViewItem

Code Reader
 

I believe that your S600 is OBDI - The second one will work - Before you buy, goto http://pages.prodigy.net/jforgione/MB_S500.html/ - outstanding site for this and other topics.

You should have the LED/sw combo (X11/21) already near the F23 module box. Check the picture in my pages in MENU#2 that shows a capped pushbutton (pb) and LED. The LED flashes, you count the blinks and look up the "blinks" meaning in a DTC book.

Following the method described in MENU#2 will get the stored codes in the Diag Module (Menu#6).

The scanners described in your link are for "OBDII" compatible Mercedes from 1996 and on.

The second link you posted is basically what you already have (pb+LED), assuming that it is there. If you don't have a pb+LED, you may want one of the Alpha-bid scanners. The "mercedes" compatible version is in the link below but it's still for OBDII models. You also would need the "OBDII-to-38-pin" cable. It implies that it will give 'blink' codes if your car isn't OBDII compatible, so it basically turns into a "pb+LED" combo. However it may NOT?? Not enough info to say for sure.

http://cgi.ebay.com/ebaymotors/Mercedes-Benz-S-E-Class-Code-Reader-Scanner-OBD2-c-clk_W0QQcmdZViewItemQQcategoryZ43989QQihZ014QQitemZ330065965828

You can't get all of the codes from the OBDII port on a '96+ Mercedes. I'm not sure about that adapter cable, but since it plugs into that scanner, it probably also can't get all of the codes.

I read that some people make there own? Is there anyone that has an extra one or can make one for me so I know its the right one for this vehicle? If you can please let me know I can pay for it through paypal. I would appreciate it.

Did you check to see if you have a "X11/21 LED+sw combo" in your car?? You should do that first. If it's there, then you can get codes from the Diag Module . . . and that's a start.

Certainly you can make one yourself or get one from the 'e-bay' link; that's basically what the LED+sw combo is except that you can get codes from all of the populated pins in the 38 pin connector.

That second link you posted is my auction and it will give you the blink codes (and descriptions) for all of the systems on the 38 pin module (as pictured in the auction).

From the description:

1992 - 1995 - w140 - 600SEL, S600 - Fuel Injection (LH-SFI), Ignition System, Electronic Accelerator, Cruise Control/Idle Speed Control, Base Module, Diagnostic Module - Check Engine Light, SRS - Airbag, ADS, Climate Control

Like Jim mentioned it is just an extension of the led/sw that is possibly built into the diagnostic module. I believe that this switch only allows you to read codes from the diagnostic module (pin 19).

If you have other questions I'd be happy to try to answer them.

Did you check to see if you have a "X11/21 LED+sw combo?


Im not sure what this is or how to check it. Im not up to much on newer cars and computer. How would I check if I have this??

To read all codes on pre-'94 cars and most codes on '94-'95 cars, all you need as an LED from Radio Shack (picture). The cost is $1.29. Part number is 276-209. It's use is described in this thread: http://www.benzworld.org/forums/r129-sl-class/1266535-diagnostics-sl-pre-94-a.html.

I think I can fit 1.29 in my budget hahaha. SO after buying that how do you build one? I didnt see it in that link?

I think you should forget the LED+Sw combo and go straight to the 38 pin code reader. It's very easy to build and use except that instructions are spread out across about 150 different threads and it takes approximately a week to find it all. I have a summary I can email - check your private messages.

deanyel thanks, I emailed you.

There is nothing to "build". You simply connect each of the LED leads to the diagnostic connector. For that I use banana plugs inserted into the connector sockets and connect these to the LED with wires.

The code reader described in this thread and countless other places uses an LED, a switch, a fuse, and a resistor. The fuse is redundant, the switch is unnecessary; and if you get the LED from Radio Shack that I mentioned, the resistor is built-in.

If you are not "up to much on newer cars. . ", how are you going to use a scanner or code reader???

I'd strongly suggest you use what you have start by checking out what we have suggested such as REALLY read MENu#2 and REALLY look for LED+Sw combo. Doing that will give you a foundation for going further. It should show you what's going on and where to 'measure' these codes.

Building a code reader is great but you got to know how to use it; that ONLY comes from doing some reading. . . . maybe a lot of reading. It doesn't get 'infused'. . .sorry to say.

Hmmm, maybe I will hold off on doing this I dont want to mess anything up. Hopefully someone at the marin gathering might have one that I can take a look at and see how to make one.