C63 AMG (W204) 2008 - 2015
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C63 LSD

Old May 13, 2024 | 03:00 PM
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C63 LSD

I am currently looking at W204 C63s and found that most of them apparently have open diffs? If this is true is there an easy way to tell if it was fitted with an LSD without lifting it/emailing Benz themselves for original equipment.
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Old May 13, 2024 | 03:29 PM
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Yes, the W204 came standard with open differential, except for the Black Series. The easiest way is to use a VIN decoder and look for option code 471. I don't know how it was optioned for the US market. May have been part of a performance package or something. The LSD became standard equipment with the W205. The PFL non-S had a standard mechanical LSD and the S had a standard electronic locking differential. With the FL, AMG discontinued the mechanical LSD and both the S and non-S have the electronic locking differential, with the S getting the 9-stage traction control from the GT R to differentiate it from the non-S.

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Old May 13, 2024 | 11:08 PM
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Pre-Facelift W204 P30 package came with LSD
Facelift W204 P31 package did not come with LSD, and it's now a separate line item
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Old May 14, 2024 | 11:42 AM
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W204
Originally Posted by poots
Pre-Facelift W204 P30 package came with LSD
Facelift W204 P31 package did not come with LSD, and it's now a separate line item
unless you have a mixed up/confused 2011 like mine which is pre-facelift P31, no LSD, but factory updated headbolts and plastic valve covers.
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Old May 14, 2024 | 11:51 AM
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That is true for USA cars. All performance package (APX) cars sold in Canada had a LSD. Not sure about European and ROW cars.
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Old May 14, 2024 | 12:28 PM
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Originally Posted by blay127
unless you have a mixed up/confused 2011 like mine which is pre-facelift P31, no LSD, but factory updated headbolts and plastic valve covers.
whoa! That’s an interesting spec. That’s about where my sweet spot would be. Just throw a wavetrac in it and it’s money! I loved my 722.9 with the torque converter. It was a great daily and I never experienced any of the jerkiness that some of the MCT cars seem to have.
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Old May 14, 2024 | 12:30 PM
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Originally Posted by Diabolis
That is true for USA cars. All performance package (APX) cars sold in Canada had a LSD. Not sure about European and ROW cars.

Except for Canadian 2010 C63 Performance Package cars. The LSD was a separate option from the Performance Package.
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Old May 14, 2024 | 01:58 PM
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Originally Posted by Mort
Except for Canadian 2010 C63 Performance Package cars. The LSD was a separate option from the Performance Package.
AFAIK the 2010 Canadian cars with the Performance Package had an LSD and a stiffer suspension but no increase in engine power. They would have been the equivalent of the P30 package in the US but with the addition of an LSD.
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Old May 15, 2024 | 06:22 PM
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Originally Posted by Diabolis
AFAIK the 2010 Canadian cars with the Performance Package had an LSD and a stiffer suspension but no increase in engine power. They would have been the equivalent of the P30 package in the US but with the addition of an LSD.
You are thinking P30 for the 2009 cars with the LSD and stiffer suspension. The 2010 cars had the P31 package with the uprated engine and increased engine power but the LSD was a separate option. The charge over started with builds sometime in December 2009.
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Old May 15, 2024 | 07:21 PM
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I am not positive about the 2010 and 2011 cars, but AFAIK all Performance / Development Pack cars here came with the LSD. Unlike in the US, there was no standalone P31 package. All facelift cars (2012+) that had the APX development package definitely came with an LSD as well as the stiffer suspension from the P30 package (which was completely dropped and not available in the US). Are you only referring to the 2010 and 2011 pre-facelift cars?
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Old May 15, 2024 | 08:34 PM
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I am referring to the 2010 because I had one with the performance package and the LSD was a stand alone option and not included in the performance package for that year. Not sure about the 2011 model year and how it was packaged.
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Old May 15, 2024 | 08:37 PM
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Originally Posted by Mort
I am referring to the 2010 because I had one with the performance package and the LSD was a stand alone option and not included in the performance package for that year. Not sure about the 2011 model year and how it was packaged.
Thanks - that's good to know.
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Old May 16, 2024 | 03:41 AM
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Does anyone have any specs on the OEM LSD?

I heard it only locks 30% max. vs. 100% in many after market LSD solutions.

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Old May 16, 2024 | 10:30 AM
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Originally Posted by amgfreak87
Does anyone have any specs on the OEM LSD?

I heard it only locks 30% max. vs. 100% in many after market LSD solutions.
The 30% lockup on the OEM diff sounds about right - but what is incorrect is the 100% in many after-market solutions. 100% lockup means that the two rear wheels (driveshafts) would be welded together and that every time you go around a corner, the outer rear wheel no longer has the ability to turn faster than the inner wheel seeing as it has to travel a longer path. You would not be able to drive on the road with 100% lockup, which is why "differential lock" capability is usually only present on vehicles for off-road use if they need to make it through deep snow or mud.
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Old May 16, 2024 | 11:02 AM
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Originally Posted by amgfreak87
Does anyone have any specs on the OEM LSD?

I heard it only locks 30% max. vs. 100% in many after market LSD solutions.
I don't know what the actual lock ratio is, but typically LSDs lock between 25-40%. I found BMW uses a 25% ratio. As said above, 100% lock is only possible in a straight line. That's one of the benefits of the eLSD in the W205. It can transition to 100% lock coming out of a corner and reduce the lock ratio according to the steering angle etc. to allow turning. I see RENNtech has an LSD for the W204 that claims 100% lock in a straight line, but not sure how they do that w/o an electronic component to it.
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Old May 16, 2024 | 12:39 PM
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Here's a decent write-up of how diffs work on the Bimmerforums site:

https://www.bimmerforums.com/forum/s...56#post3750056

The LSD that RENNtech sells is an OS Giken Super Lock. The language is somewhat misleading, but you can see how it works at https://osgikenusa.com/pages/the-os-...-lsd-explained. OS Giken does make excellent diffs... I have one in one of my race cars.

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Old May 17, 2024 | 05:38 PM
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the factory LSD is a 50/90 degree so a 1.1 way differential with 25-30% lock.

vendors like racing diffs offer upgraded plates and steels and can get the lock ratio to 80%.
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Old May 18, 2024 | 08:00 AM
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Originally Posted by eightysixtuned
the factory LSD is a 50/90 degree so a 1.1 way differential with 25-30% lock.

vendors like racing diffs offer upgraded plates and steels and can get the lock ratio to 80%.
Correct. Some German company was selling custom-made drop-in diffs where both the accel and decel are at an angle, and I have either extra or thicker plates in mine to modify the preload. I get some lock on decel as well - IIRC it was a 60/40 or something like that (instead of the OEM 30/0) when new. As the clutch plates wear out you lose some of the lock, but they are easy to rebuild.
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Old May 18, 2024 | 01:19 PM
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2009 came with the LDS

Originally Posted by Mort
Except for Canadian 2010 C63 Performance Package cars. The LSD was a separate option from the Performance Package.
my 2009 came with LSD, Canada
471 MECHANICAL LOCKING DIFFERENTIAL
do some more digging, there are a bunch of Dodge/ Chryslers out there with the same diff in them.
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