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Old 11-27-2013, 04:47 PM
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Indy Shop Can't Read OBD Codes ML350

Curious if anyone has experienced similar..... 06 ML350 CEL on. Indy shop connects diagnostic PC to car and can not read the codes. Seems to be my car. I've personally seen them read countless other benzes with the same gear. Older... Newer...

The dealer says they can read the codes.

Ideas?

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Old 11-28-2013, 11:23 AM
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Bad code reader. OBD2 is a standard that everyone can read.
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Old 11-29-2013, 10:17 AM
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I don't know about down your way, but here in CT we have Autozone and Advance Auto, auto parts stores that will scan your car for free. I haven't personally done it because they can only scan OBDII cars and my 2 Benzes pre-date that and forget about the 911, that car has no computers in it. Only my Volvo would be able to be scanned, but I have had no issues with it.
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Old 11-29-2013, 12:17 PM
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Quote:
Originally Posted by jc300e View Post
Curious if anyone has experienced similar..... 06 ML350 CEL on. Indy shop connects diagnostic PC to car and can not read the codes. Seems to be my car. the codes......
Yeah, I've seen this before. It seems to occur on 203's and 163's exclusively. I've never seen it happen to a 164. The owner finds out about the problem when they go to state inspection. I'm told it's a timing issue between the ME-SFI module and the scan tool. You can try a different scanner.

Sometimes repeated disconnect/reconnect will get it working. In many cases that I've seen it was necessary to replace ME.

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