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Marty
Marty, Mercedes Technician
Category: Mercedes
Satisfied Customers: 53292
Experience:  Bosch Certified Master Tech. Over 35 years experience.
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Mercedes-Benz C280: how can i open my trunk manually to install

Customer Question

how can i open my trunk manually to install my new battery in a c class 280?
Submitted: 5 years ago.
Category: Mercedes
Expert:  Marty replied 5 years ago.

eurotec :

Hi

eurotec :

To open the trunk with the key you need to insert the key and turn it counterclockwise to the 10 o'clock position and hold it there then push in on the lock. Is that what you have tried?

JACUSTOMER-fqalgvo9- :

yes that is what i tried, i also tried to pump it before i did it as well

eurotec :

Ok, there is also a positive jumper terminal under the hood just in front of the fuse box. You can attach a jumper cable there and use the remote or the trunk release switch in the car to open the trunk.

JACUSTOMER-fqalgvo9- :

that wont work my battery is already off the cables in the trunk

eurotec :

It will still work

eurotec :

Just attach the positive to the terminal and the negative to the chassis.

JACUSTOMER-fqalgvo9- :

ill try

eurotec :

Ok, do you know where the terminal is located?

JACUSTOMER-fqalgvo9- :

not really im assuming infront of fuse box like you said

eurotec :

Just in front, under a cover with an X marked on it.

JACUSTOMER-fqalgvo9- :

ok whats the chassis look like

eurotec :

The chassis is the body of the car. You attach your ground jumper cable to any metal point on the body of the car. You can also attach it to a metal bracket or bolt on the motor. You just want to be sure that it is a good ground and not something that is insulated in rubber.

eurotec :

Full Size Image

JACUSTOMER-fqalgvo9- :

give me a few minutes im going to go try your advice

eurotec :

X12/3 is the jumper terminal

eurotec :

in the picture above

JACUSTOMER-fqalgvo9- :

i couldnt get it im just going to have it towed to mercedes thanks for your advice

eurotec :

You're quite welcome