SL-Class (R230) 2003 -- 2012: Discussion on the SL500, SL550, SL600

SL/R230: Clear Oil Dripping SL550 - 2007

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Old Dec 8, 2022 | 11:08 PM
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Clear Oil Dripping SL550 - 2007

Have not even enjoyed her much just yet and she is asking for money already
Found a wet spot on the garage floor right by the front wheel (driver's side) and it is clear oil. I also found sign of running oil when I popped up the hood, please see the photos!
Please help me to know what is dripping and what is the best way to take care of it! Thank you very much in advance!!!


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Old Dec 9, 2022 | 09:59 AM
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ABC (suspension)?
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Old Dec 9, 2022 | 06:24 PM
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Easy cheap fix. Either ensure the sensor mounting hardware is tight or pull the sensors and replace the o-rings.
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Old Dec 9, 2022 | 08:41 PM
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Thanks Dr.!
Is this the sensor you were talking about?
I checked and the hardware is secure and tight. Is this a simple DIY job? If the o-ring is needed, could you please let me know where is the best place to order a replacement?
Would there be oil pouring out when I pull out the sensor?

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Old Dec 11, 2022 | 06:53 PM
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Those are camshaft position sensors (there are two on this side and two on the other bank of cylinders), and the wider round discs next to them are magnets. I changed all 4 of each on both sides as a preventative measure. You can get them on Amazon (Bosch). They come complete with fresh o-rings. Cheap and easy fix on 7 of them. It's possible you're leaking from the magnet to the left of this sensor. if that's the case this you can only remove it by removing the oil cooler (and replace those gaskets when there too as these tend to leak eventually). The sensors and magnets do not cause oil to spill out since the oil will have settled towards the bottom of the engine. It's a bit messier when removing the oil cooler. I did that when I was changing the oil - and subsequently replaced that magnet behind. Just by the way when removing the electrical connections be careful but also expect the clips to break, from age and heat. Not a huge issue as you can still put them back on and they'll hold, just don't be shocked or dismayed when it happens.

Last edited by Sozo; Dec 11, 2022 at 06:57 PM.
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Old Dec 11, 2022 | 07:43 PM
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Thank you, Sozo! I have zero knowledge about fixing cars so I'll bring it to an MB-certified local mechanic tomorrow. It's great to know what you pointed out. Appreciated!!
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