Dead battery, Open Boot

49150 Views 14 Replies 10 Participants Last post by georgebuhr, Apr 6, 2016

Celesabc

Discussion Starter · Jan 1, 2009

Hello all, I have a 1995 C220, my battery went flat this morning; Can't open the boot with my key / button does not work.

I searched the forum and found out there should be a black box in the engine compartment which allows me to jump start the vehicle?

I can't locate a black box with Positive Symbol on it (I only manage to find the fue box and a black box above it however screwed); anyone can take a picture of this black box? or mind telling me where it sits? (Need unscrewing or not etc).

Mine is a right hand drive.

Thanks a lot!

1 - 15 of 15 Posts

bmeister

· #2 · Jan 1, 2009

According to the prior postings the black box for the postive jumping is located near or below the fuse box ( in engine bay) you will have to remove the cover to find the post.
Have you had a look at these?
Shut the Trunk on a Disconnect Battery - Mercedes Benz Guide and Repair Wiki

http://www.benzworld.org/forums/w202-c-class/1379399-help-omg-keys-locked-trunk.html

http://www.benzworld.org/forums/w202-c-class/1378445-c280-1998-trunk-problems.html

http://www.benzworld.org/forums/w202-c-class/1292824-help-who-knows-where-connect-jumps.html

You may want to try the key again in reference to above postings. B

Celesabc

Discussion Starter · #3 · Jan 1, 2009

I do not have such key as mine does not have a remote.

I will try locating it tom morning (Under fuse box)

Thanks a lot!

xvvvz

· #4 · Jan 1, 2009

I put up pictures here:

CLUB202.COM

bmeister

· #5 · Jan 2, 2009

2

Have you tried lubricating the lock?

Celesabc said:
I do not have such key as mine does not have a remote.

I will try locating it tom morning (Under fuse box)

Thanks a lot!

There are several types of lubricants that can be used for lock cylinders for the hard key. Since most of us don't use the manual key its a good idea to hose them out from time to time. O.k. so this isn't working either...Have you found the exterior post? I am assuming the rear vac pump is inop. because of the battery issue.
Try this as per courtesy of xvvvz concerning the pics.
you should have a post in the engine bay . B

See less See more

Celesabc

Discussion Starter · #6 · Jan 3, 2009

Manage to get it started this morning.

Thanks a lot people! Much much appreciated.

tonysmallz

· #7 · Mar 21, 2009

bmeister said:
There are several types of lubricants that can be used for lock cylinders for the hard key. Since most of us don't use the manual key its a good idea to hose them out from time to time. O.k. so this isn't working either...Have you found the exterior post? I am assuming the rear vac pump is inop. because of the battery issue.
Try this as per courtesy of xvvvz concerning the pics.
you should have a post in the engine bay . B

ok so the picture on the right is how you charge the battery from the engine bay.. but wherer do i put the posotive and negative connections

any help greatly apriciated

thanks

xvvvz

· #8 · Mar 21, 2009

Positive goes to either one of the large posts. Negative goes to any good grounding point. There is a big hook/ring on the engine that is the attachment point where you attach one of the hooks to raise the engine out of the engine bay. It is pretty obvious to find, so try that.

VicC220

· #9 · May 4, 2009

xvvvz said:
Positive goes to either one of the large posts. Negative goes to any good grounding point. There is a big hook/ring on the engine that is the attachment point where you attach one of the hooks to raise the engine out of the engine bay. It is pretty obvious to find, so try that.

The large posts you are referring to .... those in the pic below right???

See less See more

xvvvz

· #10 · May 5, 2009

Ya...

danny_fitz

· #11 · Jun 23, 2010

Hi there, I have a similar problem to the OP (flat battery and locked boot).

I drive a diesel 1996 C220 W202 (right hand drive) and annoyingly the photos above do not look like what I have under my bonnet!! In my car the fusebox is on the rear left of the engine bay and the ECU is on the rear right if viewed standing in front of the car. Next to the ECU there is a triangular box that flips open to reveal a single post that has there cables attached to it.

Is this the post I need to connect the postive red lead to?

Thanks in advance

Danny

gmascoli

· #12 · Dec 23, 2010

Has anyone done this?????

I have located these posts in my car but I am afraid of blowing the on-board computer or other accessories if I screw this up.

I was planning to hook up in this order:
1) connect jumper cable to one of these positive posts
2) connect other end of positive jumper cable to the positive term on the good battery
3) connect negative jumper cable to the negative term on the good battery
4) connect final negative jumper cable lead to ground point on the engine

I do not plan to start the car, I just want power to open the trunk
Am I safe?

bne74honda

· #13 · Sep 28, 2014

Open dead battery trunk

Hey,

The process you outlined works perfect. I just did it on my C230 and...pop!..up went the trunk. Yes, you are safe.

Brian

htr2775

· #14 · Apr 6, 2016

Just a caution

Hi, I know this thread is old but it helped me out today, I had taken the battery out to be tested at the parts store and closed the trunk lid. I had no idea the button on the trunk wouldn't work, and the emergency key didn't fit (trunk lid had been replaced).

After reading through the post and pondering my situation, I decided that it would be a good idea to make sure the positive cable wasn't touching anything in the trunk (like part of the car). This may be a good idea before you hook up a battery with 800 cold cranking amps using jumper cables and wind up welding something together by accident.....

If you have removed the battery and you don't remember the state of affairs in the trunk when you closed it. The first-aid kit can be removed from the package shelf and you can shine a flashlight down into the hole to make sure the positive battery cable isn't touching anything.

For extra safety, instead of using a battery, which in Mercedes case looks strong enough to start a submarine, I used a small battery charger..a 3 amp charger had enough juice to power the trunk release button inside the car (a 1-amp charger did not).

See less See more

georgebuhr

· #15 · Apr 6, 2016

Good points made, and I was going to add before I saw your post, I would not recommend charging from the post under the hood. The way you did it was safer, because even if the battery post was touching, the 3 amps that the charger puts out isnt going to cause a huge arc, but it could still damage ecu, etc, so good thing you checked. But IMO only use the post under hood to get access to the trunk, then charge at the battery, so you dont cook any wires between the engine bay and the battery.

Reactions: 1

1 - 15 of 15 Posts

This is an older thread, you may not receive a response, and could be reviving an old thread. Please consider creating a new thread.