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S-Class (W222) 2014-2020

449 HP or 455 HP

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Old Aug 7, 2014 | 08:10 PM
  #1  
Cptdenny's Avatar
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From: Port St. Lucie Florida
2009 SL600, 2015 Lexus RX450h, 2014 S550
449 HP or 455 HP

I'm seeing two different horse power ratings for the US Mercedes 2014 S550 in reviews. Is it 449 HP or 455 HP?
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Old Aug 7, 2014 | 08:51 PM
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2018 C63S
I believe it is 455 HP
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Old Aug 7, 2014 | 10:10 PM
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S 550
The mercedes brochure for the 2014 that I saved from last year said it was 449hp.
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Old Aug 8, 2014 | 07:05 AM
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2012 CLS63
449
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Old Aug 8, 2014 | 08:16 AM
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A connected issue is whether the engine is 4.6 or 4.7L. Some places it states 4.6 and others it states 4.7.
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Old Aug 8, 2014 | 08:31 AM
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The 2015 S Class brochure says 449.
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Old Aug 8, 2014 | 09:07 AM
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S 550
Originally Posted by MTrauman
A connected issue is whether the engine is 4.6 or 4.7L. Some places it states 4.6 and others it states 4.7.
The Mercedes brochure from 2014 states it is a 4.6 liter.
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Old Aug 8, 2014 | 09:24 AM
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'25 S63 AMG E Performance, '26 CLE 53 AMG
Originally Posted by DaveVY
The Mercedes brochure from 2014 states it is a 4.6 liter.

Correct. My MSRP sticker from my 2014 S550 4Matic also states 4.6. And the MBUSA website for the 2015 S550 and the 2015 brochure states 4.7 liter.
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Old Aug 8, 2014 | 09:38 AM
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'25 S63 AMG E Performance, '26 CLE 53 AMG
2014 stats


Engine
4.6-liter biturbo Direct Injection V-8
449 hp @ 5,250–5,500 rpm
516 lb-ft torque @ 1,800–3,500 rpm


2015 stats


Specifications
S 550








Engine
4.7-liter biturbo Direct Injection V-8
449 hp @ 5,250–5,500 rpm
516 lb-ft torque @ 1,800–3,500 rpm


These are copied and pasted from the '14 and '15 US brochures of the S Class.
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Old Aug 8, 2014 | 11:10 AM
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S 550
Originally Posted by MTrauman
2014 stats


Engine
4.6-liter biturbo Direct Injection V-8
449 hp @ 5,250–5,500 rpm
516 lb-ft torque @ 1,800–3,500 rpm


2015 stats


Specifications
S 550








Engine
4.7-liter biturbo Direct Injection V-8
449 hp @ 5,250–5,500 rpm
516 lb-ft torque @ 1,800–3,500 rpm


These are copied and pasted from the '14 and '15 US brochures of the S Class.
Hah! Someone in marketing decided to round up the engine displacement this year!
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Old Aug 8, 2014 | 12:09 PM
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2013 650i Coupe, 2010 IS250 AWD, 1999 S500
It has always been a 4.7L engine and the hp for the U.S. version is 449. It is 455 in Europe because of the conversion, 449 is SAE and 455 is the DIN measurement. There is no difference in power or displacement just how it is rated/calculated.

M
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Old Aug 8, 2014 | 01:42 PM
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2023 AMG SL55,2015 S550 4MATIC, 2023 BMW X5
Agreed. My 2015 S550 shows 4.7 litres, 285 cubic inches. 449 hp.

This is probably enhanced marketing-speak; the swept volume of the engine hasn't changed.
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Old Aug 8, 2014 | 11:57 PM
  #13  
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449hp or 455hp

When I purchased my 2009 CL63 there were two different horsepower figures being advertised (518 and 525). When I asked my service advisor about the two different numbers he said in the United States that 2 "charcoal" filters are required for emissions and they came equipped with the car, and overseas the filters were not required, and that accounted for the seven horsepower difference. "IF" that is true, maybe the same applies here ?
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Old Aug 11, 2014 | 04:56 PM
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No. It is the rating system. One is SAE and the other is DIN.

M
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