E-Class (W124) 1984-1995: E 260, E 300, E 320, E 420, E 500 (Includes CE, T, TD models)

Any Suggestions...?

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Old Apr 23, 2006 | 11:43 PM
  #1  
oneill_1's Avatar
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MB 300E | BMW M Coupe
Any Suggestions...?

Where would the most reliable yet inexpensive place to diagnose a 'Check Engine' light? Mine is on and i dont want to spend too much for a diagnostic test. Thanks
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Old Apr 24, 2006 | 12:10 AM
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a TVR Cerbera Speed Twelve
You can take it to pep boys or autozone and have them pull the codes out for you...It might be related to emissions or your O2 sensor, dunno..

Last edited by battlecat714; Apr 24, 2006 at 12:29 AM.
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Old Apr 24, 2006 | 04:54 PM
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MB 300E | BMW M Coupe
Originally Posted by battlecat714
You can take it to pep boys or autozone and have them pull the codes out for you...It might be related to emissions or your O2 sensor, dunno..
What codes? More info please...Just go and ask them for codes for my car and they should know what to do? After i got the codes, what do i do?
thanks
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Old Apr 24, 2006 | 06:05 PM
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1990 300ce
the computer in your car is triggering the "check engine" light because it is detecting that something isn't right. When this happens, the computer in your car uses a coding system to tell you what's wrong. But you have to have the correct device to connect to the computer in order to determine what the code is. Then, you go to an MB shop manual and determine what the code means.

That's how the mechanics narrow down the specific cause. It's hardly a fool-proof system though. Again, all it does is narrow things down for them.
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Old Apr 24, 2006 | 06:40 PM
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W124
No matter where you go expect to pay an hours worth of labor.
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Old Apr 24, 2006 | 06:55 PM
  #6  
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a TVR Cerbera Speed Twelve
Originally Posted by oneill_1
What codes? More info please...Just go and ask them for codes for my car and they should know what to do? After i got the codes, what do i do?
thanks
There's a black box next to the battery, underneath its cover is the button that they have to press down in order for the codes to come up, in LED light form. From there, the tech can determine exactly what type of problem you have...NorCal124 is right, the job is an hour's worth.

Last edited by battlecat714; Apr 24, 2006 at 06:58 PM.
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Old Apr 25, 2006 | 03:18 AM
  #7  
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Is there a way of checking this out myself? If so, how do I check it?
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Old Apr 25, 2006 | 11:40 AM
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1993 300CE Sportline
secret decoder ring

The only way to get the code "out" of the car is to hookup a device that reads the code, kind of a secret decoder ring but more expensive. Most mechanics have them. I'd personally only trust the coding and repairs to a shop that "regularly" repairs mercedes.
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Old Apr 25, 2006 | 11:47 AM
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you can make one yourself. look in the various mercedes forum and search for "code reader."

cost about $5 to make
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