YamiR46

Hey guys, so I went to jump my car from the front since my battery is dead and I can't open the trunk to remove it. Well, I hooked it up to the front and I'm pretty sure my battery is fried because I'm getting no juice. I've had to do this a few years back and it worked..but now I'm lost. The weird thing is I just looked in to my car and noticed these lights are all glowing with no key in the ignition:



(The lights are a little dimmer than shown in the picture btw)I'm lost, lol. Any help would be great! I ran out of light and I have to wait until morning.

YamiR46

Update: The lights in the picture above are no longer illuminated. They stayed on for a good 10-15 minutes.

insame1

why not?

YamiR46

I have no power to open the trunk and the key isnt working either.

insame1

so when you hook up the jumper under the hood you key fob still does not work? what have you done to try to get the physical key to work?

Chadzu

Fold the seats and you can in a pinch get to the battery

GatorMB

If you have a key for the trunk then start power blasting some spray lube into the key hole.
Lit it sit overnight and do it again.
Get a suitable pliers and work the lock over with key. Gentle twist back and forth with an occasional inward push which opens the trunk.
Patients and lube will open it.
I would think the FOB should open it if a strong power source is connected to the battery terminal under the hood.
Hmmm!

cindyclk

While you have the jumper hooked on in the front, you are supplying power to all parts of the car. Your release button inside car should open it...unless there is a much more serious problem going on.

YamiR46

Well..the battery is definitely fried. Apparently when my neighbor tried to help me jump my car he put the negative jumper on the connection instead of the positive.. > So I'm hoping it only killed my battery and blew a fuse. Huge fail lol. I'm going to try to lube the crap out of the key hole to get it open. I've been out of town for 5 days so I haven't had the chance to mess with it yet.

YamiR46

I think the only way to fold the seats in the rear is to use the release for the seats that are located in the trunk.

KJI3jflarryfe93

a free and a good advice.

when you manage to open your trunk always keep one of the latches unlocked in the trunk, one part of the rear backrest will stay unlocked for safety reasons so you can crawl into the trunk from the backseat if something happens in the futura, someone might jam a screwdriver into your lock you can't access your trunk, what ya gonna do, who do ya gonna call?
you going to have to call Lockbusters to help you out?

I say maybe this might help you?
if you don't manage to unlock your trunk, drain it with WD-40 let it soak for several hours
try to carefully use you blade key and wiggling your lock with the key.
maybe you can try to blow it clean with a hosed air pressure nozzle?

this might be your last option if the other ones don't work out for ya?
you can also try to remove the backseat cushion and then unbolt one part of the backrest.


MB locks are crap quality, if you don't use your key on regular basis exercising the bootlock with your blade key, lock will seize and destroy inside from salt, debrise and other crap.
I bought a plastic cap made for bootlocks from stealership, keeping bootlock and doorlock clean and lubed with oil protected by the tiny plastic cap
just plug the cap in to protect your locks

smart thing to do is to visit your stealership ordering the plastic cap for locks.

good luck fixing your issue

shadenfroh

That's called neglect. I don't see how other makers' locks are any different and I've seen a few.

It's a moving, grinding part and it needs maintenance.

KJI3jflarryfe93

I'm only familiar with MB, have no experiance with other brands

not many people know that the locks needs lubing and exercise with metal blade key.
when battery goes flat or soemthing else happens your're locked out.

the small metal protective flap on the lock which push in when you insert the key doesn't protect very much, gunk might still get inside causing all kinds of issues over the years if you don't use your blade key on regular basis.

keep the lock lubed, buy the plastic cover plug, insert it and now and then exercise your lock with the blade key.
lock will reward you

YamiR46

Well..after 500mg of caffeine and a good amount of lube I got the trunk open lol. Battery is definitely donzo. Is there a fuse that would go out as well due to the event of a jumper cable being crossed?

shadenfroh

Look at the black box directly in front of the battery.

RPB

Ok my friend, this is what you need to do. Remove the medical kit and the plastic tray below on the rear decklid. The tray pry's out with not a lot of force on either side. You will now find a small open space. At this point you have access to the cables that release the rear seats on both sides. I used the cable on the driver side. Find a piece of wood or something strong to push down on that cable to release the seat. It will take a few tries, but be persistent. You really need to put some force in the downward position on that cable and it will release the seat so you can gain access to the battery. You might need a flashlight too. I tried to search for the article for you and was unable to locate it. Trust me though follow this procedure. This is considering you have a coupe and not the convertible. I will keep my fingers crossed that you own a coupe. The OVP should of done its job in terms of your neighbors mistake.

Btw pay no mind to shadenfroh, I never do this but the guy is a fool. Who in the world would consider not using a trunk key neglect. We use the remote for a reason. One must understand that if a lock is not manually turned over a long period of time it will cease at some point or require a good amount of work to turn it. In my case I disconnected the battery and closed the trunk. I recently acquired the car and never used the key in the trunk, so how would I have known. I figured it would work, but it did not. This cannot be considered "neglect". Neglect is not flushing the oil at the proper intervals or pushing off a repair when you know there's a serious issue. I guarantee you the majority of 208 and 210 owners out there are completely unaware of this issue on their car. I attempted to unlock my 210 from the trunk after I realized the problem and sure enough the same exact issue as my 208. I hate to see people respond like that and felt the need to comment. We're here to help each other out. He simply responded back w/ a meaningless post. This is not your fault!!

Best of luck,

-Rob

shadenfroh

Babble all you want, young man. My lock works.

GatorMB

Likely over scanned the post, Its all good as he was trying to help.

Lets Benz

RPB

Your locking mechanism apparently works, but for many it does not. Hence the reason for the post from the OP. I will leave it at that.

insame1

an attitude like this will surely net you a positive response and lots of help in the future

W202AMG

Mine works too, and he is correct, it requires lubrication and maintenance, just as any lock cylinder does when exposed to weather regularly. It should be done every time the car is serviced, and lock cylinder operation should be checked at the same time.

If it is not operating, it is as simple as spraying in some appropriate lubricant, then working the key in and out a few times, then turn it back and forth with key all the way in until it starts to work. Can take a while.

Keep the WHOLE car maintained, and these issues will be less likely to occur.

PKSlice

I had the EXACT same problem, dead battery and trunk key will not turn. If it was a 30 year old GM or Ford it would probably work perfectly.

W202AMG

Yeah, its not uncommon, but it is caused by failure to maintain them correctly.

If it was 30 yr old GM or Ford it wont matter which key you put in there, itll probably still turn...