W221 Rear diffuser
I am in need of some advise.
I have a 2008 S320 CDI long wheel base.
I have the AMG front and rear bumper.
At present the rear exhaust pipes are not visible as they are hidden behind the rear diffuser and are pointing downwards.
I want to change this so that I can put on a quad tile pipe.
What I wanted to ask is if it is a straight swap for the rear diffuser i have with that of the w221 s63?
I have been told that I have the option of the square or oval quad tailpipes but i need to find the correct diffuser.
MB told me that they have the s63 (W221) diffuser on sale for 169+vat but cannot guarantee it will fit.
Any advice?
Also are the diffusers for the oval and square tailpipes different?
I got mine from dealership, just get a vin number for a S63 or S65 when you order it.
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Also, what is the difference between the s63 and s65 diffuser? I have seen 2 varieties but not sure which one belongs to the respective models.
Also, why do you advise me to get the 2010-2013 diffuser when my car is a 2008 W221? Should i not be getting a 2008 s63 diffuser?
many thanks
Does anyone know the MG part number for the diffuser and the 2nd layer.
Also, does anyone know what this second layer is called?
On another forum someone stated that the 2008 w221 C320cdi only has a single part.


is the first pic circled item same as part 22 on the second pic? looks kind of different on the second picture. But one of the part #s provided by JT matches piece 22 in the second picture.
Last edited by kamilclk430; Jan 7, 2014 at 11:08 AM.
Attachment 277441
my cousins has a s320 2007 that all he did was swap out diffuser, see pic above where I commented earlier
Hi JT.550,
Do you have a VIN number i can use to call mercedes with. They said that if they have the VIN of a vehicle with the diffuser on it, they can confirm if it will fit my vehicle. I am just about to order the parts you suggested but they keep telling me they cannot guarantee it will fit nor will they refund for the items if it doesnt.
Many Thanks
This pic is 2007 s320 just swapped out diffuser






