Alright so I'm new to the s500 world. I'm purchasing this one from my work and have begun trouble shooting it. The purpose of this post is to make sure that my digging, and research is correct and or if I am missing something. The car has no power, and will not jump. I'm not able to get into the trunk so I tried the the second way I found on line. But when I tried to jump it, no lights nothing not even a beep from the car. But the connectors sparked after a minutes so I disconnected them, and ceased any further ventures until I did more research. Oh and to top it all off I don't have a key for the car yet, gotta have one made.
From my research and digging km the interwebs, everything is pointing towards the sams in the car. Correct me if I'm wrong, but from what I've found on here and several other forums and websites this car has 3 a FL , FR , RL .Is this correct? I've been looking for replacements for them and am wondering on the reliability of buying a used unit/s? Or maybe one that's been remanufactured?
Oh and my names Caleb, this is my first post and it will most definitely not be my last. Cheers 🍺

 

Rather than trying to apply external power to try things, I would try to charge the battery from the main power bus under the right front carpet and aluminum panel. I would clean and test the fuses and connections under there first.

 

Didn't know this could be charged, I haven't found anything talking about that. Is there a sub forum that talks about it or tells more info on it?

 

Didn't know this could be charged, I haven't found anything talking about that. Is there a sub forum that talks about it or tells more info on it?

 

The heavy red cables under the aluminum panel are hooked directly to the positive terminal of the battery. Hook a charger positive to the red cable, charger negative to a good body ground, see if the battery will accept a charge.

 

Will do that when I get off work, is there a way to access the trunk in case the battery doesn't accept a charge? I've been looking every where and have found nothing other than take it to the Mercedes dealership.

 

Depending upon the model year, some folks reported being able to remove the plastic trim in the rear tag area, drill a hole and access the trunk release rod. You can NOT go thru the rear seat area - the gas tank lives there. Perhaps Googling "opening W220 trunk" would help.

 

I have googled, YouTubed, hit all the forums I could find talked to the Mercedes dealership(all they said is to bring to the dealership surprise surprise.) And look through manuals and called body shops. I'm trying to avoid drilling into the trunk.

 

All you have to do is apply power under the passenger seat then hit the trunk release switch on the drivers door - that should get your access to the battery


if your car doesn’t power up when applying power there the large fuses in the black box are blown

 

Alright, which fuses are we talking about? From what by understand there's anywhere from 3-6 fuse boxes in the vehicle. 2 in the engine bay, 2-3 in the cab an 1 in the trunk? Are you referring to the Sam's?

 

WAtch the video I linked
the main fuses are located in the black box you hook power to under the passenger floor

 

The video states nothing about fuses in it, and black box is a vague statement when the car has many of them. I will look at them when I get off work.

 

You have been told numerous times - the fuses and connections that you need are under the aluminum cover that is under the front passenger carpet. Can't make it much clearer than that.

 

A DEAD battery will not allow you to do anything electric to the car--nothing. Underneath the floor carpet in front of front passenger seat you will find a shiny (aluminum color) metal plate. Remove that cover plate and you will find a number of large RED cables and fuses. Those are the main POWER distribution cables, and are connected DIRECTLY--no fuses- to the battery positive terminal. This is where you should attach jumper cables, a battery charger, or booster battery to 'jump start' the car. Connecting to the RED cables here functions the same as direct on the battery in the trunk..

The ignition key FOB must be used to turn anything on (including a jump start) . The key FOB MUST be purchased from an authorized DEALER who must order it from Mercedes.The DEALER MUST physically see the car and get the VIN number and verify YOU are the legal owner and authorized to drive the car. You MUST present ownership proof. A photocopy of the title showing you as owner, together with your valid government issued identification document/license card, etc. Blame GERMAN LAW for this multi-step (and expensive) theft prevention procedure.
The new key FOB MUST be coded to 'talk' with the electronic ignition switch, the gear selector assembly, the engine computer. Only the Mercedes factory computer system can program the new Key FOB to the other computer devices mentioned. Used key FOBS cannot be 'recoded' to work in another car. All the 'theft prevention components' are permanently programmed to work together and not with any others. Should any of those devices fail, they all must be replaced ,installed by a Dealer, and properly 'activated' by connecting with the factory computer---or they will not work.

You MUST do this to activate the electric system in the car. The anti-theft system 'bricks' the car until a genuine key FOB is inserted in the ignition switch---------.

 

There’s One black box under the passenger floor metal cover . The one with the thick battery cables in the video . Did you even watch the video and see the black box or are you just being difficult and argumentative ?

that black box under the floor has large main fuses inside it . If you apply power there as the video shows you how to do it , and you don’t see things powering up like the inside lights, headlights , can’t use trunk switch on the door , then your main fuses inside that black box. Are blown .

If things do power up when you apply power as directed in the video you should be able to just pop the trunk using the release button on drivers door . Then you can put in a fresh battery

 

Here’s a picture , taken from the video this box under passenger floor has large main

fuses inside it