Did lots of search and couldn't find much topic associated w/ knock sensor failure. I cleared the code ~ 2 days ago and it came back again today.

My understanding is that K.S hardly goes bad. If that's the case, what else can trigger the code ? Any help would be very much appreciated.

Are you sure you have the right error code? I assume you're getting this from the DM. What engine do you have?

A 1994 W124 should have an M104 3.2 litre engine.

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Steven Harrison

1993 300E2.8 - 196K
2001 E320 4MATIC - 86K

Help !!

That was a lucky guess - could have been a 119 or a 606. In any case code 25 on the 104 motor DM is "knock sensors or engine control module faulty". I'd say next step is to build Arthur's code reader and check the other PINs.

http://members.aol.com/ajdalton7/ledtool.jpg

talked to the local Indy Mech - he has no clue. Then talked to the dealership Mech - he thinks that it maight be related to foul S plugs. S plugs were replaced less than a 1,000 miles ago....makes me wonder if this is related to wiring harness issue.