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s550 2008 will not Crank but all lights are on .PLEASE HELP

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Old Apr 9, 2014 | 06:09 PM
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s550 2008
s550 2008 will not Crank but all lights are on .PLEASE HELP

Good day All :

Can some one please assist me ?

I have a 2008 S-550 ..Few days ago I was driving ..Stooped for a coffee
Then I try to start the car and it will not Crank !!! all the lights are on .

I tested the front Battery and the back and they show Strong Voltage !!
I Tap'd on the Starter and try to start but no luck !

Mercedes Dealer did scan and it show'd nothing wrong !!
I am Scared if it the Engine seized ... that's a lot of Money but if it did .. it should Crank !!

Also ...Could it be a fuel Issue ??

If we change the Starter and it is still not cranking , what shall I do ?

Thx
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Old Apr 9, 2014 | 06:32 PM
  #2  
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Originally Posted by gogomomo72
Good day All :

Can some one please assist me ?

I have a 2008 S-550 ..Few days ago I was driving ..Stooped for a coffee
Then I try to start the car and it will not Crank !!! all the lights are on .

I tested the front Battery and the back and they show Strong Voltage !!
I Tap'd on the Starter and try to start but no luck !

Mercedes Dealer did scan and it show'd nothing wrong !!
I am Scared if it the Engine seized ... that's a lot of Money but if it did .. it should Crank !!

Also ...Could it be a fuel Issue ??

If we change the Starter and it is still not cranking , what shall I do ?

Thx
What was the resting voltage of the front battery?
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Old Apr 9, 2014 | 06:40 PM
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s550 2008
Originally Posted by Mike5215
What was the resting voltage of the front battery?
In the 13th ! If I can remember right !
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Old Apr 9, 2014 | 08:56 PM
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Originally Posted by gogomomo72
Good day All : Can some one please assist me ? I have a 2008 S-550 ..Few days ago I was driving ..Stooped for a coffee Then I try to start the car and it will not Crank !!! all the lights are on . I tested the front Battery and the back and they show Strong Voltage !! I Tap'd on the Starter and try to start but no luck ! Mercedes Dealer did scan and it show'd nothing wrong !! I am Scared if it the Engine seized ... that's a lot of Money but if it did .. it should Crank !! Also ...Could it be a fuel Issue ?? If we change the Starter and it is still not cranking , what shall I do ? Thx
The starters usually goes bad.. You could check to see if the engine spins from the crank pulley(if you have tools available to you).. Also be sure to check the starter battery(up front) and auxiliary battery(trunk behind the back seat)...
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Old Apr 10, 2014 | 01:10 AM
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08' S550, 04' E320 4matic, 03' Acura TL-S 6 speed, 1968 Vespa P150
my car did the same thing when the front battery died. Freaked me out then someone here told me to replace the front battery so I did. Works like a champ.

See if you can jump start the car from the front terminal to confirm.
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Old Apr 10, 2014 | 06:23 AM
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s550 2008
We did check both Batt's and they are good !! Today I will change the starter , wish me luck .

My fear if it is not the starter what shall I do next ??
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Old Apr 10, 2014 | 06:29 AM
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s550 2008
Evansw220 :

You saying that it is common for the starter to go wrong ? , man that would be great news , I going to change it today regardless because that is my only hope.
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Old Apr 10, 2014 | 02:50 PM
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Originally Posted by gogomomo72
Evansw220 : You saying that it is common for the starter to go wrong ? , man that would be great news , I going to change it today regardless because that is my only hope.
Yea they are... Also other signs that they're bad , it keeps popping the starter fuse due to internal failure..
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Old Apr 10, 2014 | 03:32 PM
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Originally Posted by gogomomo72
In the 13th ! If I can remember right !
Not enough. 14.6 range is good. Amp draw on a W221 at start is huge. You can still have enough power to run accessories and lights on a weak battery.
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Old Apr 10, 2014 | 05:29 PM
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S550
My resting voltage on a brand new front battery is 12.5 and it starts strong...
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Old Apr 11, 2014 | 09:42 PM
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2007 S550 Sport
My 2007 S was still on its original battery up until a month ago. When it died, I had the same symptoms. Lights are on, but no crank, not even a peep. I took the battery out and charged it up, still no go. Only a jump or replacing it solved the issue. If your battery is older than 3 or 4 years, I'd replace it first before jumping to the starter as an issue.
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Old Apr 15, 2014 | 12:19 AM
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C217 s63
same thing happened on my f150. Lights would come on but not crank. Charged the battery to full and it started. Turns out the alternator needed to be replaced.
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Old May 27, 2020 | 09:37 PM
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09 mercedes s550
Originally Posted by evansw220
The starters usually goes bad.. You could check to see if the engine spins from the crank pulley(if you have tools available to you).. Also be sure to check the starter battery(up front) and auxiliary battery(trunk behind the back seat)...
how do I know if engine didn’t seize
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Old May 28, 2020 | 02:52 AM
  #14  
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W221 S500 2010
Originally Posted by Mike5215
Not enough. 14.6 range is good. Amp draw on a W221 at start is huge. You can still have enough power to run accessories and lights on a weak battery.
I don't think you are ever going to get 14.6 V at rest from any battery.

Originally Posted by Joe Ruiz
how do I know if engine didn’t seize
It is a rare occurrence and it always happens while the engine is turning.

I am one more of those who has seen everything light up, no crank, new battery, all solved.
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Old May 28, 2020 | 06:36 AM
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S550
Originally Posted by gogomomo72
Good day All :

Can some one please assist me ?

I have a 2008 S-550 ..Few days ago I was driving ..Stooped for a coffee
Then I try to start the car and it will not Crank !!! all the lights are on .

I tested the front Battery and the back and they show Strong Voltage !!
I Tap'd on the Starter and try to start but no luck !

Mercedes Dealer did scan and it show'd nothing wrong !!
I am Scared if it the Engine seized ... that's a lot of Money but if it did .. it should Crank !!

Also ...Could it be a fuel Issue ??

If we change the Starter and it is still not cranking , what shall I do ?

Thx
most likely your crankshaft sensor. Less that $40 to replace
Reply
Old May 28, 2020 | 04:17 PM
  #16  
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'15 S550, '10 E350 P1/P2, '02 ML320
Originally Posted by Joe Ruiz
how do I know if engine didn’t seize
The easy way to figure this out is remove the spark plugs and put a 27mm socket on the crank pulley, turn the engine over by hand. If you can do that, it has not seized.
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Old Jun 29, 2020 | 10:16 PM
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S550
Originally Posted by evansw220
The starters usually goes bad.. You could check to see if the engine spins from the crank pulley(if you have tools available to you).. Also be sure to check the starter battery(up front) and auxiliary battery(trunk behind the back seat)...
07 S550 fuel pump fuse keeps blowing up and starter keeps locking up too. No crank or starts. Please help .
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Old Jul 3, 2020 | 09:12 AM
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W221 S500 4matic, W220 S500
Have You tried to hold key in start position for a bit longer, than usual?
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Old Jul 3, 2020 | 10:01 AM
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S550
Originally Posted by Simonas.st
Have You tried to hold key in start position for a bit longer, than usual?
so, I replaced the starter and the fuel pump about a week ago, fives days later while trying to start the car, no crank no start. I noticed the fuel pump fuse, the 30a fuse at the back seat was blown. Replaced the fuse and blew again as soon as I tried to start the car. Towed to the mechanic, he said I will need to replace the starter again, because it burnt out again, and also, I will need a new fuel pump and now a fuel filter. He said he noticed the fuel filter at the left back seat was clogged up.

folks does this sound about right ? Can a clogged fuel filter cos all these problems? All relays looks good.

personally, I don’t see the correlation of the starter with the fuel pump or the fuel filter. Please help. Let me know what you guys think .
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Old Jul 3, 2020 | 10:36 AM
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W221 S500 4matic, W220 S500
Originally Posted by Elbalt
so, I replaced the starter and the fuel pump about a week ago, fives days later while trying to start the car, no crank no start. I noticed the fuel pump fuse, the 30a fuse at the back seat was blown. Replaced the fuse and blew again as soon as I tried to start the car. Towed to the mechanic, he said I will need to replace the starter again, because it burnt out again, and also, I will need a new fuel pump and now a fuel filter. He said he noticed the fuel filter at the left back seat was clogged up.

folks does this sound about right ? Can a clogged fuel filter cos all these problems? All relays looks good.

personally, I don’t see the correlation of the starter with the fuel pump or the fuel filter. Please help. Let me know what you guys think .
So it did worked 5 days, after You replaced starter?
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Old Jul 3, 2020 | 11:13 AM
  #21  
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Originally Posted by Simonas.st
So it did worked 5 days, after You replaced starter?

yes, the car worked perfectly for five days after I first replaced the starter and the fuel pump. Then, the car wouldn’t start again. Same exact symptoms from the first time. No start, no crack. Also worth mentioned, I had to replace both car batteries ( front and back) a week ago too.
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Old Jul 3, 2020 | 02:15 PM
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W221 S500 4matic, W220 S500
Originally Posted by Elbalt
yes, the car worked perfectly for five days after I first replaced the starter and the fuel pump. Then, the car wouldn’t start again. Same exact symptoms from the first time. No start, no crack. Also worth mentioned, I had to replace both car batteries ( front and back) a week ago too.
For me it sounds like electrical problem. You have some short circuit if it keeps blowing fuses. Unlikely that starter would burn that easy.
How handy You are Yourself?
I was always getting bull**** diagnostics at the dealership, so decided to repair it myself.
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Old Jul 23, 2020 | 09:23 PM
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S550
Originally Posted by Simonas.st
For me it sounds like electrical problem. You have some short circuit if it keeps blowing fuses. Unlikely that starter would burn that easy.
How handy You are Yourself?
I was always getting bull**** diagnostics at the dealership, so decided to repair it myself.
I’m not that handy. You won’t believe this. After the mechanic fixed the car for the second time within two weeks, I had to replace the starter(Used) and fuel pump(brand new) again and also replaced the fuel filter/ sending unit (brand new) also replaced the rear SAM this time around. Car drove fine for four days and this evening, the car won’t start or crank over again. This just happened today. It’s dark outside now but I will check in the morning to see if the same fuse 30a for the fuel pump is blown again. But for now, all interior lights coming on when push button is pressed just no crank and no start.


please, if anybody have any clue what else to do. I’ve spent roughly $1,800 for parts and labor in the last two weeks. Please, help. What can you think off to be going on? Seems electrical/ circuit shorts??

Last edited by Elbalt; Jul 23, 2020 at 09:33 PM.
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Old Oct 30, 2020 | 01:21 PM
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Originally Posted by Elbalt
I’m not that handy. You won’t believe this. After the mechanic fixed the car for the second time within two weeks, I had to replace the starter(Used) and fuel pump(brand new) again and also replaced the fuel filter/ sending unit (brand new) also replaced the rear SAM this time around. Car drove fine for four days and this evening, the car won’t start or crank over again. This just happened today. It’s dark outside now but I will check in the morning to see if the same fuse 30a for the fuel pump is blown again. But for now, all interior lights coming on when push button is pressed just no crank and no start.


please, if anybody have any clue what else to do. I’ve spent roughly $1,800 for parts and labor in the last two weeks. Please, help. What can you think off to be going on? Seems electrical/ circuit shorts??
did you find the fault?
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