S-Class (W220) 1999-2006: S 320 CDI, S 320, S430, S 500, S 600

2001 s500 got ECU stolen now what

Thread Tools
 
Search this Thread
 
Rate Thread
 
Old Apr 15, 2016 | 11:23 PM
  #1  
MbNeedshelp's Avatar
Thread Starter
Junior Member
 
Joined: Mar 2016
Posts: 37
Likes: 0
1994 w140 s350d
Thumbs down 2001 s500 got ECU stolen now what

The ECU in my beautiful 2001 S500 was stolen. I have another 2001 s500 in bad shape, that I removed the ecu and what I thought is the immobilizer (where the key fits in and turns) and used the key that went with it, swapped it all out to try and start nicer car that had the ECU stolen and the key turns, but none of the normal lights come on in the instrument cluster and car wont start... What am I missing? I was told swapping all three parts (Key "trasnsponder", immobilizer and ecu as a set) would start my other car. Please help, my bad S500 basically is a parts car being it has so many problems, but it starts and drives.

Please Help.
Reply
Old Apr 16, 2016 | 02:12 AM
  #2  
tusabes's Avatar
MBWorld Fanatic!
15 Year Member
Photogenic
Photoriffic
Liked
 
Joined: Jan 2008
Posts: 6,150
Likes: 533
Mercedes
You need to change the shifter too from the donor car

Ecu , key , shifter , and ignition switch must all be swapped as a matched set
Reply
Old Apr 16, 2016 | 11:45 PM
  #3  
MbNeedshelp's Avatar
Thread Starter
Junior Member
 
Joined: Mar 2016
Posts: 37
Likes: 0
1994 w140 s350d
Thank you so much for responding. Can you instruct me in where and how to change out the shifter ?
Reply
Old Apr 16, 2016 | 11:58 PM
  #4  
MbNeedshelp's Avatar
Thread Starter
Junior Member
 
Joined: Mar 2016
Posts: 37
Likes: 0
1994 w140 s350d
Do you mean the actual shifter, where you put in gear, or the steering column module ?
Reply
Old Apr 17, 2016 | 09:11 PM
  #5  
tusabes's Avatar
MBWorld Fanatic!
15 Year Member
Photogenic
Photoriffic
Liked
 
Joined: Jan 2008
Posts: 6,150
Likes: 533
Mercedes
The actual shifter box in the center console

There's tons of YouTube videos how to change it
Reply
Old May 3, 2016 | 11:32 AM
  #6  
MbNeedshelp's Avatar
Thread Starter
Junior Member
 
Joined: Mar 2016
Posts: 37
Likes: 0
1994 w140 s350d
Thumbs down stolen ECU

I ended up taking the car the dealer. I was told by a MB shop they tried that and as they put it "it didn't turn so well" Thank you for your help.
Reply
Old May 9, 2016 | 04:51 PM
  #7  
MbNeedshelp's Avatar
Thread Starter
Junior Member
 
Joined: Mar 2016
Posts: 37
Likes: 0
1994 w140 s350d
Angry dealer can't get car to start

I had to purchase a new ecu and now the dealer can not get the ignition to power up. they are telling me that it keeps blowing fuses in the fwd and rear fuse boxes. they also said it seems the car has water intrusion which is why the fuses keep blowing. now they are telling me the key will not even turn , which it was when i took it there. please anyone help. dont know what to do now
Reply
Old May 9, 2016 | 04:56 PM
  #8  
MbNeedshelp's Avatar
Thread Starter
Junior Member
 
Joined: Mar 2016
Posts: 37
Likes: 0
1994 w140 s350d
Angry parts car

I initially installed an ecu , key switch with matching key from a parts car i have but it would not have any action in the instrument cluster. the cluster would come on when i opened the car so I'm very confused !
Reply
MB World Stories

The Best of Mercedes & AMG

story-0

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

 Verdad Gallardo
story-1

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

 Verdad Gallardo
story-2

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

 Verdad Gallardo
story-3

8 Classic Boxy Mercedes Designs That Have Aged Like Fine Wine

 Verdad Gallardo
story-4

Flawlessly Restored Mercedes 190E Evo II Heads to Auction

 Verdad Gallardo
story-5

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

 Verdad Gallardo
story-6

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

 Verdad Gallardo
story-7

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

 Verdad Gallardo
story-8

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

 Verdad Gallardo
story-9

10 Most Reliable Mercedes-Benz Models You Can Buy Used

 Verdad Gallardo
Old May 9, 2016 | 08:51 PM
  #9  
tusabes's Avatar
MBWorld Fanatic!
15 Year Member
Photogenic
Photoriffic
Liked
 
Joined: Jan 2008
Posts: 6,150
Likes: 533
Mercedes
If it's a water damaged car it will likely never function right unless you get all SAM and wiring harnesses From a good donor car
Reply
Old May 9, 2016 | 09:51 PM
  #10  
Jack_88's Avatar
Super Member
 
Joined: May 2016
Posts: 516
Likes: 26
From: California
2018 C300
What made them suspect water intrusion? Was there damp or visible water damage? Germans love putting modules down low, so a lot is susceptible to pooling water.
Reply
Old May 10, 2016 | 08:11 AM
  #11  
MbNeedshelp's Avatar
Thread Starter
Junior Member
 
Joined: Mar 2016
Posts: 37
Likes: 0
1994 w140 s350d
Thumbs down water evidence

I inspected the car carefully and found no evidence of water, and one thing the dealer said puzzled me, the key always turned and now they are telling me the key will not turn ? I don't want think they are trying to rip me off but dang there's jut too many issues all of a sudden !
Reply
Old May 10, 2016 | 04:10 PM
  #12  
Jack_88's Avatar
Super Member
 
Joined: May 2016
Posts: 516
Likes: 26
From: California
2018 C300
I had a Chrysler dealer sabotage my car and run me about $2000 by the time the dust settled. I couldn't prove it, they'd have just said I caused the damage I found(screwdriver shaped hole in the motor side of the radiator.) So, I would say at least some suspicion is healthy unless you know the dealer well. I've also heard of dealers breaking things on accident and saying it was a preexisting condition to try to dodge liability.
Reply
Old May 16, 2016 | 09:31 AM
  #13  
MbNeedshelp's Avatar
Thread Starter
Junior Member
 
Joined: Mar 2016
Posts: 37
Likes: 0
1994 w140 s350d
Thumbs down Rear SAM damage

Seems as though the car has been in a flood ? I have not seen it since the dealer gave me the bad news. I asked them to stop all work and asked them to push it out so I could have it towed it home where I have a "donor" car waiting to be cannibalized.
Reply
Old May 18, 2016 | 02:42 AM
  #14  
tusabes's Avatar
MBWorld Fanatic!
15 Year Member
Photogenic
Photoriffic
Liked
 
Joined: Jan 2008
Posts: 6,150
Likes: 533
Mercedes
the car was not driven in a flood ,but a simple rainfall can cause the interior electronics to get flooded due to a defect

See the First post here , it's a very common problem and was the subject of a class action lawsuit but the time to file a claim is now over
https://mbworld.org/forums/s-class-w...ins-clean.html
Reply
Old May 20, 2016 | 01:40 AM
  #15  
MbNeedshelp's Avatar
Thread Starter
Junior Member
 
Joined: Mar 2016
Posts: 37
Likes: 0
1994 w140 s350d
Thumbs down Rain Not a Flood

Thank you so much for the heads up. Can I use a the good dry units from a donor car to replace the wet ones without any worries abt VIN # compatibility uses ?
Reply
Old May 20, 2016 | 04:26 AM
  #16  
tusabes's Avatar
MBWorld Fanatic!
15 Year Member
Photogenic
Photoriffic
Liked
 
Joined: Jan 2008
Posts: 6,150
Likes: 533
Mercedes
Yes you can as long as they are the same part numbers

You should be using every part from the donor car - ecu key shifter ignition switch , front and rear SAMs and wiring harness running along passenger floor

They are likely all damaged in the water damaged car and everything needs to be swapped over

Last edited by tusabes; May 20, 2016 at 04:30 AM.
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 06:25 AM.

story-0
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-1
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-2
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-3
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-4
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-5
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-6
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-7
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-8
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
story-9
10 Most Reliable Mercedes-Benz Models You Can Buy Used

Slideshow: From bulletproof sedans to surprisingly tough SUVs, these Mercedes models proved that the three-pointed star can go the distance.

By Verdad Gallardo | 2026-04-08 09:55:49


VIEW MORE