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

How does the door sill plate attach?

Thread Tools
 
Search this Thread
 
Rate Thread
 
Old Mar 29, 2026 | 06:01 PM
  #1  
RichDMB's Avatar
Thread Starter
Member
Liked
Loved
 
Joined: Apr 2022
Posts: 148
Likes: 47
From: Tewksbury, MA
2008 S550
How does the door sill plate attach?

The sill plate for the passenger front door on my 08 S550 is loose and rattling; it's the front third of it closest to the front of the car. I felt underneath the plate and don't feel any tab and it's not held down by screws. I could always use a little construction adhesive, but I would like to do it the correct way if possible. Thanks in advance.
Reply
Old Mar 29, 2026 | 06:39 PM
  #2  
RichDMB's Avatar
Thread Starter
Member
Liked
Loved
 
Joined: Apr 2022
Posts: 148
Likes: 47
From: Tewksbury, MA
2008 S550
I googled it (gotta stop being lazy) and can see there are four fasteners, so the front one must have snapped. Easy fix.
Reply
Old Apr 1, 2026 | 04:31 PM
  #3  
Alexie's Avatar
Super Member
Photoriffic
Shutterbug
Community Builder
Community Influencer
 
Joined: Jun 2025
Posts: 784
Likes: 249
From: USA
Originally Posted by RichDMB
The sill plate for the passenger front door on my 08 S550 is loose and rattling; it's the front third of it closest to the front of the car. I felt underneath the plate and don't feel any tab and it's not held down by screws. I could always use a little construction adhesive, but I would like to do it the correct way if possible. Thanks in advance.
On those W221s, the front section of the sill plate is held by a metal spring clip underneath, not a tab or screw. The clip gets weak or the plastic receiver breaks. No adhesive from factory. Pop the whole trim up carefully, check if the clip is still there or if the plastic base is cracked. Replace the clip or the trim piece if broken. It just snaps back down.
Reply
Old Apr 1, 2026 | 09:08 PM
  #4  
RichDMB's Avatar
Thread Starter
Member
Liked
Loved
 
Joined: Apr 2022
Posts: 148
Likes: 47
From: Tewksbury, MA
2008 S550
Thanks Alexie, I just got some trim removal tools from Amazon and I'll get to it this weekend. Nice to know what to expect once I pop off the door sill.
Reply
Old Apr 2, 2026 | 05:12 PM
  #5  
TimC300's Avatar
MBWorld Fanatic!
Community Builder
Liked
Loved
Community Favorite
 
Joined: Aug 2023
Posts: 3,737
Likes: 1,135
From: MA Coast
W204 2010 C300 4matic Sport M272
May have to start unclipping at the back:








Reply

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 


You have already rated this thread Rating: Thread Rating: 0 votes,  average.


All times are GMT -4. The time now is 12:30 PM.

story-0
New Electric Mercedes-AMG GT 4-Door Coupe Unveiled: 10 Things You Need to Know

Slideshow: Mercedes-AMG's new electric GT 4-Door Coupe trades combustion for software, synthetic noise, and more than 1,100 horsepower.

By Verdad Gallardo | 2026-05-20 20:08:15


VIEW MORE
story-1
6 Mercedes Models That Did NOT Age Well (But Are Somehow Still Cool)

Slideshow: Not every Mercedes design becomes timeless, some feel stuck in the era they came from.

By Verdad Gallardo | 2026-05-12 18:09:07


VIEW MORE
story-2
Manual Mercedes? 6 Times Sindelfingen Let Drivers Have All The Fun

Slideshow: Yes, Mercedes built manual cars, and some of them are far more interesting than you'd expect.

By Verdad Gallardo | 2026-05-02 12:36:58


VIEW MORE
story-3
Mercedes SLR McLaren 722 S Is Extremely Rare Example Modified by McLaren

Slideshow: A one-of-one U.S.-spec Mercedes-Benz SLR McLaren Roadster became even rarer after a factory-backed transformation at McLaren's headquarters.

By Verdad Gallardo | 2026-04-29 11:19:28


VIEW MORE
story-4
8 Classic Boxy Mercedes Designs That Have Aged Like Fine Wine

Slideshow: Before curves took over, Mercedes mastered the art of the straight line, and some of those shapes still look right today.

By Verdad Gallardo | 2026-04-25 12:05:49


VIEW MORE
story-5
Flawlessly Restored Mercedes 190E Evo II Heads to Auction

Slideshow: The 190E Evolution II shows how a homologation necessity became a six-figure collector icon.

By Verdad Gallardo | 2026-04-22 17:53:47


VIEW MORE
story-6
Electric Mercedes C-Class Unveiled: 11 Things You Need to Know

Slideshow: Mercedes is turning one of its core nameplates electric, and the details show just how serious this shift is.

By Verdad Gallardo | 2026-04-21 13:58:06


VIEW MORE
story-7
Mercedes EQS Gets A Major Update: Everything You Need to Know

Slideshow: Faster charging, longer range, and a controversial steer-by-wire system define the latest evolution of Mercedes-Benz EQS.

By Verdad Gallardo | 2026-04-15 10:35:34


VIEW MORE
story-8
5 Underrated Mercedes-Benz Models That Don't Get the Love They Deserve

Slideshow: These overlooked Mercedes-Benz models never got the spotlight, but they quietly delivered more than most remember.

By Verdad Gallardo | 2026-04-13 19:35:45


VIEW MORE
story-9
Mercedes 300D Has Pushed Well Past 1 Million Miles and It Ain't Stopping

Slideshow: A well-used 1991 Mercedes-Benz 300D with more than one million miles is now looking for a new owner, and it still appears ready for more.

By Verdad Gallardo | 2026-04-10 10:05:15


VIEW MORE