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

2003 SL500 hood closed sensor

 
Old 03-03-2018, 05:59 PM
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2003 SL500
2003 SL500 hood closed sensor

Red light on dash keeps coming one when driving, goes off if stopped. Shows to be on the driver's or left side, but can not find. Part is not expensive. How do you get to it? Thanks.
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Old 03-03-2018, 09:16 PM
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CURRENT: 2011 SL550, 2010 ML350, FORMER: 2007 CLK550 Cabriolet, 2002 C240, 2001 ML320, 1984 300TD
I believe it's part of the latch. Mine does this sometimes, too. I have found that dropping the hood to close from about a foot high gives it enough of a "thump" to trip the sensor.
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Old 03-04-2018, 03:23 AM
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Thanks. Tried that several times with no luck. Might have to replace the sensor. Anyone know how to take the port hood latch out without messing up the cables? Is the sensor under the latch. There is no 'silver bar' like most Mercedes.
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Old 03-04-2018, 12:03 PM
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Here's the WIS doc:

http://benzbits.com/r230/HoodCatch.pdf

As I suspected, the sensors (S62 and S62/1) are on the bottoms of the latches. The latches are easy to remove - just a few bolts on the top. You will need to disconnect the cable, but that's fairly easy as there is a junction point on the left fender (part #6 in the diagrams).
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Old 05-03-2019, 03:33 AM
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Hey Rodney,

I've also been getting this sporadic red "WARNING: THE HOOD IS OPEN" picture on my display. It mainly shows up when I press the gas pedal a little bit more than normal. Does yours still do it? Or does it just take one 'heavy drop' of the hood for it to go away, until the next subtle close? Perhaps it was the vibrations of my bad engine mounts that caused it to become unstable.

It's not that big of a deal, unless the hood were to just fly up mid-drive... heh
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Old 05-03-2019, 03:45 PM
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You can see a micro switch at the catch on the core support. There is one on each side. My passenger side was cracked away from heat. I pinned the switch down with a small cable tie. Drivers side was still good and feel it is save enough have one working. I guess if it cracks apart I'd buy one, but this is the first car I've had that checks the hood his close. Kinda thought that's what the safety catch is for.
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Old 05-03-2019, 11:14 PM
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Mine still requires a good, solid drop to trip the switch.
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