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

2010 s550

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Old Mar 17, 2015 | 03:57 PM
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has any one experience this? I parked my car for 5 weeks, I started it up all and the messages came up on the dash,pre-safe,bas fail ect,and it refuse to go into gear and no controls on the dash works.i switched it off disconnected the battery ,and now it wont start..need lots of help.
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Old Mar 17, 2015 | 04:00 PM
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Originally Posted by sbolo
has any one experience this? I parked my car for 5 weeks, I started it up all and the messages came up on the dash,pre-safe,bas fail ect,and it refuse to go into gear and no controls on the dash works.i switched it off disconnected the battery ,and now it wont start..need lots of help.
start by getting your battery tested. it is most likely bad.
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Old Mar 17, 2015 | 09:03 PM
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My car has been parked for over two months but I've started it a few times just to keep the battery a go.
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Old Mar 17, 2015 | 10:54 PM
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Originally Posted by wilassasin
My car has been parked for over two months but I've started it a few times just to keep the battery a go.
Are we related?
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Old Mar 18, 2015 | 03:19 PM
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Agree. That's a classic under-voltage situation. Probably time for a new battery.
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Old Mar 18, 2015 | 08:10 PM
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After 5 weeks, you've likely drained your accessory battery. Same thing happened to me after having my car parked for a week....and not noticing that one of the vanity mirrors in the back was down.


Try jump starting the starter battery in the front to get the car started. You may need to let it run for a while as the accessory battery charges. After a while, those messages should disappear and you should be good to go.
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Old Mar 18, 2015 | 10:37 PM
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2010+ have only one battery. Wonder what they changed so you don't need two.
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Old Mar 19, 2015 | 01:02 PM
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Originally Posted by Jason B
Are we related?
LOL....You're car has been sitting too?
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Old Mar 20, 2015 | 12:34 PM
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Yep, pretty much, and 6 inches of snow again today. Can't escape it.
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Old Mar 20, 2015 | 07:37 PM
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Originally Posted by Jason B
2010+ have only one battery. Wonder what they changed so you don't need two.
I know the same sized battery that's in the back of the (2) battery cars (electrical/consumer battery) is now under the hood of the newer (1) battery car.
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Old Mar 20, 2015 | 08:05 PM
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So, you are saying that the engine battery for 07-09 is much smaller than the 10-13 engine battery and is the same size as the previous trunk battery from 07-09?"
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Old Mar 20, 2015 | 08:38 PM
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The engine (engine start only) battery is very small.....so small that the dealer is one of the few vendors that carry that small size. (It's damn near riding lawnmower battery sized)

The consumer battery between the rear seat& the trunk of a 07-08 is the same size (Group 49 I think) as the only battery, under the hood, in the 09 & newer.

(The blue tooth puck for size reference)




This is under the hood in the engine compartment.
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Old Mar 20, 2015 | 11:21 PM
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It sure is a cute little thing.
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Old Mar 21, 2015 | 05:09 AM
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I think size doesn't matter in this score but what I find weird is why they put a battery that requires a screw driver to remove the covers to add fluid ? That battery should have been a maintenance free ,sealed one instead
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Old Mar 21, 2015 | 05:54 PM
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So that is another source of riding lawn mower batteries - used Mercedes batteries!
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