S-Class (W221) 2007-2013: S 320 CDI, S 350, S 450, S 500, S 550, S 420 CDI, S 600

No power at all...none...zippo...zilch

Thread Tools
 
Search this Thread
 
Rate Thread
 
Old Nov 26, 2015 | 11:28 AM
  #1  
baltos550's Avatar
Thread Starter
Newbie
 
Joined: Apr 2011
Posts: 12
Likes: 0
s550 2009
No power at all...none...zippo...zilch

I have a 2009 S550 4matic and it has lost all power. Using the key to start the car, when it is turned to the "on" position, no lights on the dash turn on. The seats have no juice, the door locks do not work. The battery in the engine compartment is about 3 months old. Will have it towed to a shop, but any clues as to the cause?
Reply
Old Nov 26, 2015 | 11:47 AM
  #2  
Mike5215's Avatar
MBWorld Fanatic!
 
Joined: May 2008
Posts: 7,653
Likes: 560
2016 C300
Originally Posted by baltos550
I have a 2009 S550 4matic and it has lost all power. Using the key to start the car, when it is turned to the "on" position, no lights on the dash turn on. The seats have no juice, the door locks do not work. The battery in the engine compartment is about 3 months old. Will have it towed to a shop, but any clues as to the cause?
Start with checking that the main battery terminals are tight. If you have a voltmeter check voltage at both batteries. I think the main battery resting should be around 14v.
Reply
Old Nov 26, 2015 | 12:39 PM
  #3  
BenzV12's Avatar
MBWorld Fanatic!
10 Year Member
Liked
Loved
Community Favorite
 
Joined: Dec 2011
Posts: 4,372
Likes: 945
W212 FL
As you have a sensible post now here is an insensible one for you to cheer up your mood

Jeremy Clarkson sucked all the power out of your battery because whenever he drives a car he loudly shouts powwwwweeeeeerrrrrrrr making all the power getting into the car he drives

Reply
Old Nov 26, 2015 | 01:21 PM
  #4  
DaveW68's Avatar
MBWorld Fanatic!
Veteran: Army
10 Year Member
Loved
Community Favorite
 
Joined: Nov 2014
Posts: 4,242
Likes: 628
From: Chicago burbs
2015 S550
It sounds to me like the accessory battery in your trunk is dead or completely drained as that controls everything in your car. The fact that it also won't turn over could mean that you alternator isn't making any power and may be kaput. It could also be something as simple as the voltage regulator being shot.
Reply
Old Nov 26, 2015 | 01:46 PM
  #5  
Mike5215's Avatar
MBWorld Fanatic!
 
Joined: May 2008
Posts: 7,653
Likes: 560
2016 C300
Originally Posted by BenzV12
As you have a sensible post now here is an insensible one for you to cheer up your mood

Jeremy Clarkson sucked all the power out of your battery because whenever he drives a car he loudly shouts powwwwweeeeeerrrrrrrr making all the power getting into the car he drives

The best part about Thanksgiving is that there is no "wrong" time of the day to start smoking crack.
Reply
Old Nov 27, 2015 | 05:12 AM
  #6  
marthyh's Avatar
Super Member
 
Joined: Apr 2012
Posts: 616
Likes: 5
From: Planet Earth
S500
Originally Posted by baltos550
I have a 2009 S550 4matic and it has lost all power. Using the key to start the car, when it is turned to the "on" position, no lights on the dash turn on. The seats have no juice, the door locks do not work. The battery in the engine compartment is about 3 months old. Will have it towed to a shop, but any clues as to the cause?
Have you left the rear vanity mirrors in the roof open ?
Which would explain a flat accessoiry battery(in the trunk) so no powerlocks have experienced this on several occassions.
But then,when you use the key to enter the car, you would still be able to start..
Perhaps a main fuse blown ?

Last edited by marthyh; Nov 27, 2015 at 07:25 AM.
Reply
Old Nov 27, 2015 | 11:31 AM
  #7  
baltos550's Avatar
Thread Starter
Newbie
 
Joined: Apr 2011
Posts: 12
Likes: 0
s550 2009
Problem solved. A little embarrassing, the battery cable was loose. Thanks Mike5215. Always good to start with the basics.
Reply
Old Nov 27, 2015 | 11:19 PM
  #8  
Mike5215's Avatar
MBWorld Fanatic!
 
Joined: May 2008
Posts: 7,653
Likes: 560
2016 C300
Ha! I got one right. Glad that's all it was.
Reply
MB World Stories

The Best of Mercedes & AMG

story-0

6 Mercedes Models That Did NOT Age Well (But Are Somehow Still Cool)

 Verdad Gallardo
story-1

Manual Mercedes? 6 Times Sindelfingen Let Drivers Have All The Fun

 Verdad Gallardo
story-2

Mercedes SLR McLaren 722 S Is Extremely Rare Example Modified by McLaren

 Verdad Gallardo
story-3

8 Classic Boxy Mercedes Designs That Have Aged Like Fine Wine

 Verdad Gallardo
story-4

Flawlessly Restored Mercedes 190E Evo II Heads to Auction

 Verdad Gallardo
story-5

Electric Mercedes C-Class Unveiled: 11 Things You Need to Know

 Verdad Gallardo
story-6

Mercedes EQS Gets A Major Update: Everything You Need to Know

 Verdad Gallardo
story-7

5 Underrated Mercedes-Benz Models That Don't Get the Love They Deserve

 Verdad Gallardo
story-8

Mercedes 300D Has Pushed Well Past 1 Million Miles and It Ain't Stopping

 Verdad Gallardo
story-9

10 Most Reliable Mercedes-Benz Models You Can Buy Used

 Verdad Gallardo

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 


You have already rated this thread Rating: Thread Rating: 0 votes,  average.


All times are GMT -4. The time now is 01:20 PM.

story-0
6 Mercedes Models That Did NOT Age Well (But Are Somehow Still Cool)

Slideshow: Not every Mercedes design becomes timeless, some feel stuck in the era they came from.

By Verdad Gallardo | 2026-05-12 18:09:07


VIEW MORE
story-1
Manual Mercedes? 6 Times Sindelfingen Let Drivers Have All The Fun

Slideshow: Yes, Mercedes built manual cars, and some of them are far more interesting than you'd expect.

By Verdad Gallardo | 2026-05-02 12:36:58


VIEW MORE
story-2
Mercedes SLR McLaren 722 S Is Extremely Rare Example Modified by McLaren

Slideshow: A one-of-one U.S.-spec Mercedes-Benz SLR McLaren Roadster became even rarer after a factory-backed transformation at McLaren's headquarters.

By Verdad Gallardo | 2026-04-29 11:19:28


VIEW MORE
story-3
8 Classic Boxy Mercedes Designs That Have Aged Like Fine Wine

Slideshow: Before curves took over, Mercedes mastered the art of the straight line, and some of those shapes still look right today.

By Verdad Gallardo | 2026-04-25 12:05:49


VIEW MORE
story-4
Flawlessly Restored Mercedes 190E Evo II Heads to Auction

Slideshow: The 190E Evolution II shows how a homologation necessity became a six-figure collector icon.

By Verdad Gallardo | 2026-04-22 17:53:47


VIEW MORE
story-5
Electric Mercedes C-Class Unveiled: 11 Things You Need to Know

Slideshow: Mercedes is turning one of its core nameplates electric, and the details show just how serious this shift is.

By Verdad Gallardo | 2026-04-21 13:58:06


VIEW MORE
story-6
Mercedes EQS Gets A Major Update: Everything You Need to Know

Slideshow: Faster charging, longer range, and a controversial steer-by-wire system define the latest evolution of Mercedes-Benz EQS.

By Verdad Gallardo | 2026-04-15 10:35:34


VIEW MORE
story-7
5 Underrated Mercedes-Benz Models That Don't Get the Love They Deserve

Slideshow: These overlooked Mercedes-Benz models never got the spotlight, but they quietly delivered more than most remember.

By Verdad Gallardo | 2026-04-13 19:35:45


VIEW MORE
story-8
Mercedes 300D Has Pushed Well Past 1 Million Miles and It Ain't Stopping

Slideshow: A well-used 1991 Mercedes-Benz 300D with more than one million miles is now looking for a new owner, and it still appears ready for more.

By Verdad Gallardo | 2026-04-10 10:05:15


VIEW MORE
story-9
10 Most Reliable Mercedes-Benz Models You Can Buy Used

Slideshow: From bulletproof sedans to surprisingly tough SUVs, these Mercedes models proved that the three-pointed star can go the distance.

By Verdad Gallardo | 2026-04-08 09:55:49


VIEW MORE