Merceses Benz 4matic

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BKNOWLER
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I have a 1992 MB 300TE with 4matic. The 4matic yellow light does not go out, so I assume the 4matic is not working. I have had the module tested, it is OK. The transfer case is OK, as is everything else we've checked. Any ideas or suggestions?
Jan 3, 2006 at 1:17 AM

What to check next

Diagnostic guidance. Suggested checks and possible repairs are separate from the owner's reported results.

Obtain the actual 4MATIC diagnostic results and details of the earlier tests before choosing a repair.

Guidance references and applicability

Source: This question and its visible discussion. The roadmap distinguishes the original owner's reports from other participants' experiences; proposed follow-up is editorial guidance, not a confirmed diagnosis.

Read the replies · Discussion summary and reported outcome

AI-ASSISTED GUIDANCE · REVIEWED BY 2CARPROS
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STRAILER
  • ✓Experienced Mechanic
  • 55,549 POSTS
You are going to need to scan it for trouble codes and go from there.[/url]
Jan 4, 2006 at 2:47 AM
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LOUZBENZ904X4
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I HAVE AN OWNERS MANUAL AND IT INFORMS ME OF A TEST LEVER THAT DE ACTIVATES THE 4 MATIC I PULL IT THE LIGHT COMES ON , AND IT DISABLES THE TRANSFER CASE ,ALSO SELF LEVELLING FUCTION, ALSO HAD A LIGHT COME ON AFTER REPLACIONG O V P RELAY ( OVER VOLTAGE )
HAD TO REMOVE 4 MATIC CPU when they put it back i guess the connection was not quite correct i removed and replacxe re/re 4 amtic cpu and light went off hope it helps if your still interested
Dec 14, 2006 at 11:17 AM
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LOUZBENZ904X4
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i have just replaecd all hydraulic oil and transfer case fluids , i realize that if there is any air in the system it may be trapped , mine stayed on and i bled the system at the test valve and now light is back out , and alll is good , hope any info helps
Dec 16, 2006 at 2:59 AM
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STRAILER
  • ✓Experienced Mechanic
  • 55,549 POSTS
good info, thanks for the input, :D
Dec 18, 2006 at 3:29 AM
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Discussion summary

Merceses Benz 4matic

The owner of a 1992 Mercedes-Benz 300TE reported a persistent 4MATIC warning despite checks said to show the module and transfer case were satisfactory. A contributor recommended retrieving system codes.

Reported outcome: The original owner did not report a resolved warning.

Later accounts of a control-unit connection and hydraulic bleeding came from another participant. Their results and procedures are not established for the original vehicle.

Read the original discussion

AI-ASSISTED SUMMARY · REVIEWED BY 2CARPROS
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