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

s320 come to short halt when putting foot down, then takes off. Any ideas??

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Old Aug 18, 2011 | 10:39 AM
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S320 CDI (Brabus D6)
s320 come to short halt when putting foot down, then takes off. Any ideas??

Hi guys,

In my 07 320 CDI, when i take off fast, putting the food down, the car seems to choke up first then kicks in, like it comes to a near halt? This happens always when putting the foot down from takeoff. And sometimes when putting the foot down when at really low speed. I cant imagine this being normal?

So just to try explain, lets say your travelling at 15mph and then put the foot down u feel the car kick in picks up a a little then chokes up kinda throws you forward, then the car takes off.. the halt lasts about a second.

I only have the car a few months so i dont know, a friend was saying it could be a safety function but to me it feels less safe that way. Wondering if anyone else has experienced this. Thanks.
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Old Aug 18, 2011 | 08:27 PM
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Mine do not behave like that.

Last edited by Tobby; Aug 18, 2011 at 11:15 PM.
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Old Aug 18, 2011 | 10:24 PM
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S320 CDI (Brabus D6)
Originally Posted by Tobby
Mine to not behave like that.
Hey, thanks for the reply. Yours does not behave like that, you mean?

And if you put your foot down right from been stopped how does your traction work? does your car some off or does it spin or what happens?
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Old Aug 19, 2011 | 01:59 AM
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Originally Posted by realizment
Hey, thanks for the reply. Yours does not behave like that, you mean?

And if you put your foot down right from been stopped how does your traction work? does your car some off or does it spin or what happens?
I think he said his does not behave like yours. I think he means that.

Mine does not behave like yours either, if I interpret your description right.

At full acceleration from standstill traction control may take control and then you feel like the engine stalled momentarily. This can happen on a dry road too.
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Old Aug 19, 2011 | 09:59 PM
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2010 S350
Originally Posted by realizment
Hi guys,

In my 07 320 CDI, when i take off fast, putting the food down, the car seems to choke up first then kicks in, like it comes to a near halt? This happens always when putting the foot down from takeoff. And sometimes when putting the foot down when at really low speed. I cant imagine this being normal?
I had the same problem with my previous car (C320), and had to change the air mass sensor.
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Old Aug 20, 2011 | 03:12 PM
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S320 CDI (Brabus D6)
Originally Posted by nadir813
I had the same problem with my previous car (C320), and had to change the air mass sensor.

Thanks guys, Hey is the air mass sensor expensive to replace?
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Old Aug 22, 2011 | 10:24 PM
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2015 s550v4
I have 07 s550....similar symptom, but no where near what I would call a "stall"....push the pedal hard and there is a hesitation for about 1/2 to 1 second of silence before the engine seems to react...quite irritating...deal has said "normal operation"....
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Old Aug 23, 2011 | 09:35 PM
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2010 S350
Originally Posted by realizment
Thanks guys, Hey is the air mass sensor expensive to replace?
It was approximately $400
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Old Aug 24, 2011 | 03:34 PM
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2007 Mercedes S320
I have this exact same problem with my S320, so MB will be taking a look soonish, will let you know their diagnosis
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Old Sep 7, 2011 | 08:54 PM
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Prash - Did you take it in? What was diagnosis?
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Old Sep 16, 2011 | 05:49 PM
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2007 Mercedes S320
Yes mate........it was a faulty gearbox. My car now has a brand new automatic gearbox fitted by MB, drives perfect, pulls away real quick.
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Old Sep 17, 2011 | 09:38 AM
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2015 s550v4
Prash - Thanks for the update....For all those with an s550...is there any delay when putting foot down when travelling slowly (25-35 mph)? I get a hesitation of 1/2 second or so before anything happens (see my earlier post above)...
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