Was wondering if anyone can direct me to a fairly inexpensive device for reading computer codes? I have a 97 S420. Are any of these units compatible with other manufacturers/models. Thanks.

lee

I have a SnapOn EuroChecker, which is a code reading and re-setting tool. It comes with all cables and software needed for most 1990+ Audi, BMW, Mercedes, VW, Volvo, etc., cars.

Most 1992 MB cars (like mine) don't respond to this unit - it is intended to work on 95+ MB cars, and lists the S420 specifically. Due to the fact that it doesn't work on my car, I am selling it. (It was special order, so SnapOn won't take it back).

I paid over $600, and will sell it for $500 (all cables, books, carrying case, etc., in "as new" condition - only the MB cable has been opened, and used only once.

Send me a PM if interested.

-David
92 500sel (new tranny, so cool)
86 560sel (ratty, broken)
85 535i (nice, for sale $2900)
92 ZX11 (can't hear the radio, but what a sunroof...)
89 EX500 Superbike (Daytona ROC Champion - 94 and 96)

Lee,
Starting in 1996, the W140's went to a digital powertrain management system. There's good news and bad news.
Good news: Your car has an OBD-II connector under the dash, near the steering column. This was mandated by US Federal DOT law and will provide you access to basic code data. Many simple scanners can read these DTCs and it will give you "pointers" to things that are wrong. You need to keep in mind that data obtained via the OBD-II system generally won't provide "the answer" if you're having a problem, but they will point you in the general direction. Just about any OBD-II scanner will work on this. I use an interface and software that runs on my laptop so I can see the data more easily and monitor some functions (like the O2 sensors) real time. Again, this system will give you basic code information. You'll need some experience to translate this information into knowledge. Run a search on OBD-II and I'm sure you'll find much on this.
The bad news: Mercedes kept all the "good stuff" for powertrain management in a manner more difficult and expensive to get to. There is a 38 pin connector under the hood on the passenger side. I won't go into this because you said "inexpensive", but there are scanners that can read this data stream (including engine, transmission, climate control, air bags, etc) but they aren't cheap or simple. I have a Snap-On MT2500 that works well for me.
Hope this helps.

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KenP

1996 S500 W140 Coupe

Here is another option for you: http://www.iequus.com/item.asp?cid=10&pid=3100
This is what I use.
It will cost you about $ 150.00 and will work on just about any vehicle produced in 1996 and newer.

__________________
2007 C 230 Sport.

manny,

are you restricted with what you can do with this unit or will it read and allow you to reset most codes? thanks

lee

You can read all the " basic ", or generic codes, as well as clear them.
As KenP pointed out correctly, it does not compare to anything an M-B dealer has, or some of the mega bucks units available elsewhere.
For basic troubleshooting ( which is what I bought it for ), it does a good job.

__________________
2007 C 230 Sport.

What, if anything, is available for reading and resetting codes on 94 and older OBD I Cars?

__________________
N. Hodges
1994 S350
1987 300 SDL (for sale)

Thanks, Manny. I just wanted something that would kind of allow me to stay on top of things.

lee

You will not find much that is "inexpensive".

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85 300CD
83 300TD
78 240D (daughter)

OBD1 is flash code and can be gotten with a simple led/sw circuit....
Archieves.