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Discussion Starter #1
Does any know where the knock sensor is located on the M273 motor SL550? Ive looked around the rear of the engine as well as jacking the car up and looking under the exhaust manifolds on both sides and cant seem to find one. Thanks
 

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2004 SL600 Renntech Stage 2
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Both knock sensors are located under the intake manifold in the valley of the block. The intake manifold has to come off to replace it.
 

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Discussion Starter #3
Yea, I noticed the wiring going under there, I thought it would be too noisy next to the valve train but I guess not. Thanks for the reply.
 
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