OBDII reading
Thread Starter
Senior Member
Joined: Oct 2009
Posts: 333
Likes: 2
From: NYC
2007 C280 4Matic
OBDII reading
So today my car threw its first check engine light.
I grabbed my OBDII reader (ELM327 ie universal) plugged it in and fired up Digimoto. As I had some many times before on all my cars.
When I did this on the Benz the diagnostic came up that my scantool wont communicate with the engine. (mind you it does some basic communication with the car)
So I cant check my codes.
I tried using the port under the steering wheel. Are there any others that I should be aware of? Possibly one in the engine bay that might work?
I grabbed my OBDII reader (ELM327 ie universal) plugged it in and fired up Digimoto. As I had some many times before on all my cars.
When I did this on the Benz the diagnostic came up that my scantool wont communicate with the engine. (mind you it does some basic communication with the car)
So I cant check my codes.
I tried using the port under the steering wheel. Are there any others that I should be aware of? Possibly one in the engine bay that might work?
MBWorld Fanatic!
Joined: Mar 2009
Posts: 1,545
Likes: 0
From: Saint Augustine, FL
1999 CLK320 (sold), 2007 C230 SS (gone), 2000 Grand Marquis, 2011 CR-Z, stay tuned...
That's odd. I have used an OBDII reader from an auto parts store (borrowed) and it worked fine for me to both read and clear the code. Good luck.
Senior Member
Joined: Jan 2010
Posts: 283
Likes: 2
From: Mississauga, Ont.
2007 C280 4matic Avantgarde
Thread Starter
Senior Member
Joined: Oct 2009
Posts: 333
Likes: 2
From: NYC
2007 C280 4Matic
I found the problem, the I hyper-terminated into the car, and asked it "what are valid commands"
It responded back, in German and basically told me I'm SOL.
When I connect to my mazda it responds back in English not japanese, when I connect to my volvo I dont get bork bork bork I get English (and its very polite). So it looks like Mercedes uses its own interface, IE I need a mercedes compatible program to communicate with it. It might be that standalones have this modified language, but I dont.
Anyone else have luck with a PC based OBD connection? What program did you use?
It responded back, in German and basically told me I'm SOL.
When I connect to my mazda it responds back in English not japanese, when I connect to my volvo I dont get bork bork bork I get English (and its very polite). So it looks like Mercedes uses its own interface, IE I need a mercedes compatible program to communicate with it. It might be that standalones have this modified language, but I dont.
Anyone else have luck with a PC based OBD connection? What program did you use?
Last edited by zerocover; Apr 9, 2010 at 11:39 PM.
Thread Starter
Senior Member
Joined: Oct 2009
Posts: 333
Likes: 2
From: NYC
2007 C280 4Matic
I just tried PCMscan, I get connection established on COM4, no connection to car make sure key is in on position etc... Mind you I have my key in position 2 or the car turned on.
In other news my check engine light has mysteriously gone away, but I still want this thing working.
I need to look up the specifics of the KWP protocol now.
In other news my check engine light has mysteriously gone away, but I still want this thing working.
I need to look up the specifics of the KWP protocol now.
Last edited by zerocover; Apr 10, 2010 at 11:05 AM.
Newbie
Joined: Jan 2010
Posts: 4
Likes: 0
C200K
You must turn the key to the position before starting or engine started.
As I recall, we need to adjust com port buffer size to be smaller.
Go in setting --- control panel ---- system ----hardware ----device manager
select com port ---- port setting ---- advance----and adjust buffer size.
This is for Windows XP. Hope this help.
As I recall, we need to adjust com port buffer size to be smaller.
Go in setting --- control panel ---- system ----hardware ----device manager
select com port ---- port setting ---- advance----and adjust buffer size.
This is for Windows XP. Hope this help.
Trending Topics
Junior Member
Joined: Feb 2011
Posts: 68
Likes: 0
c240
Chek Engine Light - No codes
'02 c240 89K miles
The check engine light (and the yellow triangle with !) came on this morning and stayed on for about 3 miles. Then coming back home, the CEL was off.
Used the innova 3130 scan tool but there were no codes stored, not even pending codes. It shows green light emission status.
Any ideas wahy there are no codes if light was on for three miles?
The check engine light (and the yellow triangle with !) came on this morning and stayed on for about 3 miles. Then coming back home, the CEL was off.
Used the innova 3130 scan tool but there were no codes stored, not even pending codes. It shows green light emission status.
Any ideas wahy there are no codes if light was on for three miles?
MB World Stories
The Best of Mercedes & AMG
8 Classic Boxy Mercedes Designs That Have Aged Like Fine Wine
Verdad Gallardo
Flawlessly Restored Mercedes 190E Evo II Heads to Auction
Verdad Gallardo
Electric Mercedes C-Class Unveiled: 11 Things You Need to Know
Verdad Gallardo
Mercedes EQS Gets A Major Update: Everything You Need to Know
Verdad Gallardo
5 Underrated Mercedes-Benz Models That Don't Get the Love They Deserve
Verdad Gallardo
Mercedes 300D Has Pushed Well Past 1 Million Miles and It Ain't Stopping
Verdad Gallardo
10 Most Reliable Mercedes-Benz Models You Can Buy Used
Verdad Gallardo
Mercedes Teases Updated EQS With Steer-By-Wire and a Yoke
Verdad Gallardo
8 Mercedes Models With Poor Reliability Records
Verdad Gallardo
Super Moderator
Joined: Jun 2008
Posts: 19,942
Likes: 191
From: Llandudno, Cape Town, South Africa
late 2009 CLK 350 Coupe Elegance, '65 Jaguar S Type wires
Software/firmware brain fade - it happens. Clears on a reboot by stopping & restarting the car generally. Don't worry about it unless it happens again.
Last edited by Glyn M Ruck; Sep 17, 2011 at 02:09 PM.
