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

CEL on - where's the OBD II connector?

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Old Mar 5, 2011 | 03:31 PM
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Phalcon51's Avatar
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From: Monrovia, CA
1992 300E, 2006 E350 and 2006 C230 Sport
CEL on - where's the OBD II connector?

The CEL came on in my 2006 C230 Sport recently. There's absolutely no change in performance or fuel mileage that I can detect but I'd like to check it out. Can anyone tell me where the OBD II connector is located? I looked under the dash but didn't see anything obvious. Any suggestions on a good, inexpensive OBD II reader that can read and reset the codes?

Thanks
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Old Mar 5, 2011 | 03:35 PM
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UK-C200's Avatar
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From: London, GB
RHD C200 Sport Coupe, RHD SLK-55, LHD SLK-350
Under the dash, down by the hood release, with a cover over it.
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Old Mar 5, 2011 | 04:28 PM
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2002 c230
Make sure it clears codes, and also has the correct protocol for your mercedes.

For my 20002 c230 I needed one with KWP2000

I got the 3130 after doing reviews, but its over 100.

Lesser versions of the same thing at walmart for cheaper.

Some bids on ebay.

There are other suggestsinos and links on the forum somewhere.

Any idea what a good voltmeter for a car that can be used in the house as well is? Haha.
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Old Mar 5, 2011 | 04:41 PM
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From: London, GB
RHD C200 Sport Coupe, RHD SLK-55, LHD SLK-350
Originally Posted by Onericali

Any idea what a good voltmeter for a car that can be used in the house as well is? Haha.

Hard to beat a Fluke - pricey, but mine is over 10 years old and going strong.
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Old Mar 5, 2011 | 05:10 PM
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Phalcon51's Avatar
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From: Monrovia, CA
1992 300E, 2006 E350 and 2006 C230 Sport
Originally Posted by Onericali
Make sure it clears codes, and also has the correct protocol for your mercedes.

For my 20002 c230 I needed one with KWP2000
How can you determine what protocol is required?

I was looking at the Actron CP9575 or the Equus 3100 Innova CAN OBD2, both available from Amazon. Does my car have a CAN system?
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Old Mar 6, 2011 | 09:20 AM
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From: Llandudno, Cape Town, South Africa
late 2009 CLK 350 Coupe Elegance, '65 Jaguar S Type wires
Yes - The unit requires OBDII/CAN compatibility. The 3100 Equus series are all fine. I use a 3130
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