E-Class (W211) 2003-2009

2009 E550 4Matic P2784

Thread Tools
 
Search this Thread
 
Rate Thread
 
Old Mar 30, 2023 | 06:00 PM
  #1  
Johnnyb46's Avatar
Thread Starter
Member
5 Year Member
Photogenic
Liked
 
Joined: Jan 2021
Posts: 125
Likes: 5
2007 cls 550
2009 E550 4Matic P2784

What can this code mean do I need new transmission solenoids I just did a conductor plate and new connector replacement
Reply
Old Mar 31, 2023 | 11:39 AM
  #2  
konigstiger's Avatar
Out Of Control!!
 
Joined: Jul 2003
Posts: 15,901
Likes: 4,632
From: North Scottsdale, AZ
'71 Pinto
OBD p2784 = speed sensors. Sensors are incorporated into conductor plate odd replacement is causing this code. Possible defective CP, current part # is 1402701161 (need VIN to confirm).

Reply
Old Mar 31, 2023 | 11:46 AM
  #3  
Johnnyb46's Avatar
Thread Starter
Member
5 Year Member
Photogenic
Liked
 
Joined: Jan 2021
Posts: 125
Likes: 5
2007 cls 550
Originally Posted by konigstiger
OBD p2784 = speed sensors. Sensors are incorporated into conductor plate odd replacement is causing this code. Possible defective CP, current part # is 1402701161 (need VIN to confirm).

WDBUF90X69B438846


Reply
Old Mar 31, 2023 | 11:58 AM
  #4  
Johnnyb46's Avatar
Thread Starter
Member
5 Year Member
Photogenic
Liked
 
Joined: Jan 2021
Posts: 125
Likes: 5
2007 cls 550
Originally Posted by konigstiger
OBD p2784 = speed sensors. Sensors are incorporated into conductor plate odd replacement is causing this code. Possible defective CP, current part # is 1402701161 (need VIN to confirm).


I wud need these right
Reply
Old Mar 31, 2023 | 12:23 PM
  #5  
konigstiger's Avatar
Out Of Control!!
 
Joined: Jul 2003
Posts: 15,901
Likes: 4,632
From: North Scottsdale, AZ
'71 Pinto
If steadfast on replacing solenoids rather than revisiting conductor plate itself where problem resides.
Attached Files
File Type: pdf
Parts list.pdf (1.18 MB, 91 views)
File Type: pdf
WDBUF90X69B438846.pdf (603.7 KB, 94 views)
Reply
Old Mar 31, 2023 | 12:52 PM
  #6  
Johnnyb46's Avatar
Thread Starter
Member
5 Year Member
Photogenic
Liked
 
Joined: Jan 2021
Posts: 125
Likes: 5
2007 cls 550
Originally Posted by konigstiger
If steadfast on replacing solenoids rather than revisiting conductor plate itself where problem resides.
so I shud look at the conductor plate instead of replacing the solenoids is wat u saying
Reply
Old Mar 31, 2023 | 01:19 PM
  #7  
konigstiger's Avatar
Out Of Control!!
 
Joined: Jul 2003
Posts: 15,901
Likes: 4,632
From: North Scottsdale, AZ
'71 Pinto
Have you read post 2?
Reply
Old Mar 31, 2023 | 01:22 PM
  #8  
Johnnyb46's Avatar
Thread Starter
Member
5 Year Member
Photogenic
Liked
 
Joined: Jan 2021
Posts: 125
Likes: 5
2007 cls 550
Originally Posted by konigstiger
Have you read post 2?
yes speed sensors might be a defective conductor plate
Reply
MB World Stories

The Best of Mercedes & AMG

story-0

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

 Verdad Gallardo
story-1

6 Mercedes Models That Did NOT Age Well (But Are Somehow Still Cool)

 Verdad Gallardo
story-2

Manual Mercedes? 6 Times Sindelfingen Let Drivers Have All The Fun

 Verdad Gallardo
story-3

Mercedes SLR McLaren 722 S Is Extremely Rare Example Modified by McLaren

 Verdad Gallardo
story-4

8 Classic Boxy Mercedes Designs That Have Aged Like Fine Wine

 Verdad Gallardo
story-5

Flawlessly Restored Mercedes 190E Evo II Heads to Auction

 Verdad Gallardo
story-6

Electric Mercedes C-Class Unveiled: 11 Things You Need to Know

 Verdad Gallardo
story-7

Mercedes EQS Gets A Major Update: Everything You Need to Know

 Verdad Gallardo
story-8

5 Underrated Mercedes-Benz Models That Don't Get the Love They Deserve

 Verdad Gallardo
story-9

Mercedes 300D Has Pushed Well Past 1 Million Miles and It Ain't Stopping

 Verdad Gallardo
Old Mar 31, 2023 | 01:24 PM
  #9  
konigstiger's Avatar
Out Of Control!!
 
Joined: Jul 2003
Posts: 15,901
Likes: 4,632
From: North Scottsdale, AZ
'71 Pinto
And...
Reply
Old Mar 31, 2023 | 01:52 PM
  #10  
Johnnyb46's Avatar
Thread Starter
Member
5 Year Member
Photogenic
Liked
 
Joined: Jan 2021
Posts: 125
Likes: 5
2007 cls 550
[QUOTE=konigstiger;8750769]And...[/QUOTE

help me out and what lol 😂
Reply
Old Mar 31, 2023 | 02:09 PM
  #11  
konigstiger's Avatar
Out Of Control!!
 
Joined: Jul 2003
Posts: 15,901
Likes: 4,632
From: North Scottsdale, AZ
'71 Pinto
OBD code 2784 = speed sensors. Speed sensors are built into conductor plate (CP) and not replaceable separately. You said you replaced conductor plate, unless I misunderstood, so two choices. CP needs to be replaced again possibly being defective or pull codes using Xentry (MB diagnostics).
Reply
Old Mar 31, 2023 | 02:53 PM
  #12  
Johnnyb46's Avatar
Thread Starter
Member
5 Year Member
Photogenic
Liked
 
Joined: Jan 2021
Posts: 125
Likes: 5
2007 cls 550
Originally Posted by konigstiger
OBD code 2784 = speed sensors. Speed sensors are built into conductor plate (CP) and not replaceable separately. You said you replaced conductor plate, unless I misunderstood, so two choices. CP needs to be replaced again possibly being defective or pull codes using Xentry (MB diagnostics).
Ok I understand now and yes it have been replaced I got it off eBay but this time ima get one from the dealership instead
Reply
Old Mar 31, 2023 | 11:26 PM
  #13  
cetialpha5's Avatar
MBWorld Fanatic!
10 Year Member
 
Joined: Feb 2014
Posts: 6,190
Likes: 1,550
From: MA
2008 E350 4Matic, 2011 E350 4matic
Originally Posted by Johnnyb46
Ok I understand now and yes it have been replaced I got it off eBay but this time ima get one from the dealership instead
You bought a used conductor plate on eBay? Or was it new? Lots of fake parts out there too.
Reply
Old Apr 1, 2023 | 12:13 AM
  #14  
Johnnyb46's Avatar
Thread Starter
Member
5 Year Member
Photogenic
Liked
 
Joined: Jan 2021
Posts: 125
Likes: 5
2007 cls 550
Originally Posted by cetialpha5
You bought a used conductor plate on eBay? Or was it new? Lots of fake parts out there too.
no new this the part

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 06:31 AM.

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