W212 Bonnet/Hood will not open or even pop-up








Since then I am always adding a little oil to the locks.








the passenger side looks like there is a small opening in the bottom front corner, may be able to stick something in there and try and push the latch.
Photo shows the drivers lock on the shorter cable, longer cable is the passenger side with cover on it.
Heres just the lock on the drivers side. Push the latch in the direction of the arrow. Blue represents the cable.
Passenger side with cover. Maybe fish something thru the small opening to push the latch.
Last edited by TimC300; Aug 10, 2024 at 11:30 AM.
Watch youtube videos…there are some showing how to access the latch on both sides. The left side isn’t as tough to get to. But both sides have tough angles so use a flashlight to locate the back of the under hood latches. It will take a little time but you can do it.
Good luck!
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I have a few things to report to future people with this problem--at least in my experience with a W216 on the driver side. My comments may or may not apply to the passenger side. The below method was impossible. There is just too much in the way, and I could not even see the light beacon sitting at the latch, let alone get a 24 inch screw driver to hit it. I spent a lot of time watching YouTube videos about this. I know there are a couple videos with people claiming success by reaching in from the wheel well side. I could not get a screw driver on it that way, but also even if I could, the latch needs to be pulled toward me, so only a hook would work. From the grill pointing towards the wheel well--this had the greatest potential, as I just had to hit the bottom of the latch and push it forward. After much effort, I could not successfully do this. Maybe others could who had better luck and/or experience.
But, I did get it open. Here's what I did...my grill was off, which helped (you could also bust open your grill). I took a flex head wrench and got on the latch bolt nearest the grill. Patiently undo the bolt, and remove it. It will take a while turning 1/4 turn at a time. The hood then pops up like a 1/2 inch. You could try again with the screw driver to hit the latch. Then, look between the fender and hood. You have just barely enough access to get a flex head wrench on the other latch bolt. Again, it takes forever turning it 1/4 turn at a time, but it will eventually work its way out. When out, the entire latch releases from the radiator bracket, and the hood pops up about 3 inches, and you now have access to the latch that is suppose to hold the hood release cable. Hit that, and the hood opens. I'm writing this up here because I saw no one else on the web who did this. But I can say for certain that this works.
Last edited by nath_h; Aug 11, 2024 at 07:13 AM.
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I have a few things to report to future people with this problem--at least in my experience with a W216 on the driver side. My comments may or may not apply to the passenger side. The below method was impossible. There is just too much in the way, and I could not even see the light beacon sitting at the latch, let alone get a 24 inch screw driver to hit it. I spent a lot of time watching YouTube videos about this. I know there are a couple videos with people claiming success by reaching in from the wheel well side. I could not get a screw driver on it that way, but also even if I could, the latch needs to be pulled toward me, so only a hook would work. From the grill pointing towards the wheel well--this had the greatest potential, as I just had to hit the bottom of the latch and push it forward. After much effort, I could not successfully do this. Maybe others could who had better luck and/or experience.
But, I did get it open. Here's what I did...my grill was off, which helped (you could also bust open your grill). I took a flex head wrench and got on the latch bolt nearest the grill. Patiently undo the bolt, and remove it. It will take a while turning 1/4 turn at a time. The hood then pops up like a 1/2 inch. You could try again with the screw driver to hit the latch. Then, look between the fender and hood. You have just barely enough access to get a flex head wrench on the other latch bolt. Again, it takes forever turning it 1/4 turn at a time, but it will eventually work its way out. When out, the entire latch releases from the radiator bracket, and the hood pops up about 3 inches, and you now have access to the latch that is suppose to hold the hood release cable. Hit that, and the hood opens. I'm writing this up here because I saw no one else on the web who did this. But I can say for certain that this works.
I had the driver side hood lock on my S550 get stuck and I opened it by pulling the cable by hand thru the wheel well.
The cable runs right at the edge of the hood as single cable to a point where it splits in two separate cables for each lock. Thru wheel well I could reach the separate cables and pull the driver side one to open it.
The cable outer tube is mounted to the lock body with a rubber grommet and the hole is cut open on underside. Over time the rubber wears under vibrations and the cable falls out leaving it inoperable. Pulling the whole cable by hand thru the wheel well works as you can pull the inner core of the cable when you just pull the whole cable.
For a fix I used small cable ties on each lock to prevent cables from falling from the lock body. I did this same fix for my E550 too.
Problem is much bigger if the end of the cable becomes loose as pulling in the whole cable won’t work.




I had the driver side hood lock on my S550 get stuck and I opened it by pulling the cable by hand thru the wheel well.
The cable runs right at the edge of the hood as single cable to a point where it splits in two separate cables for each lock. Thru wheel well I could reach the separate cables and pull the driver side one to open it.
The cable outer tube is mounted to the lock body with a rubber grommet and the hole is cut open on underside. Over time the rubber wears under vibrations and the cable falls out leaving it inoperable. Pulling the whole cable by hand thru the wheel well works as you can pull the inner core of the cable when you just pull the whole cable.
For a fix I used small cable ties on each lock to prevent cables from falling from the lock body. I did this same fix for my E550 too.
Problem is much bigger if the end of the cable becomes loose as pulling in the whole cable won’t work.
Now, if I could just figure out how to remove the lower radiator bracket to extract the radiator. Really Mercedes, you had to put one of the three screws holding the bracket sandwiched between the bracket and the condenser???




Good luck!
Peter




Now, if I could just figure out how to remove the lower radiator bracket to extract the radiator. Really Mercedes, you had to put one of the three screws holding the bracket sandwiched between the bracket and the condenser???
If you still have not reattached the cable to the lock you can easily test for this with the hood open where you can see the correct cable going to the lock that does not open.
Remember, you need to pull the correct cable after the point where the cable coming from inside the car splits to two separate cable for each lock.




If you still have not reattached the cable to the lock you can easily test for this with the hood open where you can see the correct cable going to the lock that does not open.
Remember, you need to pull the correct cable after the point where the cable coming from inside the car splits to two separate cable for each lock.



