C-Class (W203) 2001-2007, C160, C180, C200, C220, C230, C240, C270, C280, C300, C320, C230K, C350, Coupe

2002 C Class uses which OBD protocol? 9141-2 ?

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Old Aug 21, 2007 | 06:34 PM
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C230 Sport Coup + 2006 W164 ML350 + 99 Ford Escort RIP
2002 C Class uses which OBD protocol? 9141-2 ?

Anyone know exactly what OBD protocol is used on 2002 C class?
Please, no guessing. (Buell...do you know this one?)


Likely I'll get a PC based setup, but need just a cheapo unit to clear codes, keep in the car since I read that an erroneous code can put your car in limp mode ala E's car.

I found some really inexpensive units at
http://www.alpha-bid.com/page12.html

They list a universal one for $17 bucks, but they say it won't work for Mercedes...then list one SPECIFICALLY for the C Class $27
(as though a standard OBDII scanner has some special functionality it can read just from C Class) and then shows the same pic as the one for $17.
And what year C Class? I've read mine is "ISO", but there seems to be several ISO protocols. Likely candidate might be 9141-2?

Newer C Class is CAN protocol for the OBD...(which really is confusing since I know I have a CAN buss, but it's not the protocol being used on the OBD circuit apparently?)

So, it's stupid for them to advertise one for "C Class"
which covers 3 chassis and over 10 years, and it's somehow different than the one they sell for the E and S classes?

I'm wondering if I can use the one for $17, and it's just another instance of someone that figures you should pay more just because you have a
Mercedes, and you're too stupid to know any better.
(even if it is just 10 bucks...it's the principal! )

They also have the CS 7.4, which I'll be ordering at some point, but don't need it now. Tires I need...

This sh-it drives me crazy.

Last edited by C230 Sport Coup; Aug 21, 2007 at 06:37 PM.
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Old Aug 24, 2007 | 12:17 PM
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Check Alex Pepper's website at www.obd-2.com, he has info on the differences.
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Old Apr 16, 2009 | 01:44 PM
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Mercedes C230 Kompressor Sedan 2003
Originally Posted by C230 Sport Coup
Anyone know exactly what OBD protocol is used on 2002 C class?
I'm trying to find the exact OBDII protocol for 2003 C class. I searched the forums and I couldn't a definite answer. Anyone has any idea?
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Old Apr 16, 2009 | 01:58 PM
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From: In Kush Land So cal
02 C320 Sedan
Originally Posted by wessamzeidan
I'm trying to find the exact OBDII protocol for 2003 C class. I searched the forums and I couldn't a definite answer. Anyone has any idea?
I bought one a while back when my plugs went bad and i was getting cel codes.. kragen was the place i got mine and it was like 70 dollars.. I think i lost it someplace though hmmm.. Anyways without this little toy i wouldn't have been able to fix my ride =D saved about 1500 dollars from the stealership doing it.
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Old Apr 16, 2009 | 04:36 PM
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Originally Posted by wessamzeidan
I'm trying to find the exact OBDII protocol for 2003 C class. I searched the forums and I couldn't a definite answer. Anyone has any idea?
"ISO 14230 protocol (also called Keyword 2000 or KWP 2000)"
Shows up as KWP2000 on mine.

Why do you ask?

Last edited by C230 Sport Coup; Apr 16, 2009 at 04:39 PM.
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Old Apr 16, 2009 | 06:46 PM
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Mercedes C230 Kompressor Sedan 2003
I got a carchip

It logs different parameters about the car, and its supposed to show error codes if any exist.

I tried it on my car, and it logged the parameters I specified (KM/h, RPM, Coolant temprature, Battery voltage). I attached a report for one of my trips.
It didn't show anything in the error logs. Most probably there are no error codes to be logged, but I want to be sure. The carchip has OBDII protocol configuration, screenshot below



It works with the standard OBDII capabilities, but I want to know if I need to choose a specific OBDII protocol for the error codes to be read by the carchip.
Attached Files
File Type: pdf
MercedesC230K.pdf (36.3 KB, 840 views)
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