Battery is unhooked key will not open trunk 2003 mercedes s430

It's in your truck,check this video out. How to jump start Mercedes S430 S500 W220 with trunk jammed or locked

what you are missing is that the key fob relates to the immobiliser that has a corrupt program from the dead battery. The keys will be ok so use a scanner to reset the immobiliser in the cpu program. Just reset the ecm and the immobiliser will reset

Change the battery on the remote.

it is the minor service, same as the A-service. change oil check all fluids and tires. change brake fluid if it has been at least 2 years and check brake pads.

you have to stick the key in the trunk and turn it to the lefy while hittin the unlock button on the key pad 35 times has to be 35 and it will unlock. my battery died and it locked the trunk as u know i coudn't jump it cause the battary is in the trunk haha but yeah 35 times while hitting the key. mercedes wont tell u but my buddy works for inskip and filled me in your o so welcome from one s430 owner to another

If you want to solve your problem, click on the link I attached 2002 Mercedes Benz S430 Workshop Service Repair Manual

Call someone in service dept at a mbz dealership. They can input your cars vin number and tell you if that car has battery connections under the hood. My 2000 s430 doesnt have any under the hood.

Hi, if all of the locks on your Mercedes fail to open (or close) first check your key fob to make certain that its battery is working. Replace the worn out battery, if necessary. If key fob is working, you may have a faulty key fob, which can be repaired or replaced by taking it to your dealer.
If just one lock won't open on your Mercedes, then the problem may rest with broken wiring, a bad solenoid, or perhaps with a blown fuse. Check your fuse box first to determine if a blown fuse is keeping the lock from working. If so, replace the fuse.
You likely have a shorted door lock actuator, which you can replace with a new unit for the lock that is not working. If a door unlocks, but will not lock again, then replace the door switch.

Besides there is not OBD II 888 code, i have never heard or seen it before...

there should be jump ports under the hood if you hook up a set of jumper cables to them it will give you the power you need to open the truck to replace to battery.

put your transmission stick to ( p ) and try to move the steering wheel right and left and pull the key out