M-Class (W163) Produced 1998-2005: ML 230, ML 320, ML 350, ML 400 CDI, ML 430, ML 500, ML 270 CDI

How do you change the CPS?

Thread Tools
 
Search this Thread
 
Rate Thread
 
Old Feb 26, 2007 | 07:29 PM
  #1  
mr1320's Avatar
Thread Starter
Newbie
 
Joined: Jul 2002
Posts: 19
Likes: 0
From: Irvine, CA
a POS
How do you change the CPS?

I've researched this site and discovered that many of you have the same problem that I have: does not start, then come back in 15-20 minutes and starts right up, once started it runs fine, no codes.

So the concensus seems to be the Crankshaft Position Sensor. I've checked with my dealer and they have a replacement for $142.80 and will pick it up today.

My question is: where is the sensor located on the engine and is it easy to replace on my own? i.e. no special tools? i would assume its on the balancer/damper or pulley. i hope its not on the flywheel side of the motor.

i'm a pretty good wrench turner as i've tinkered with cars since i was 10 so skill wise, i'd say i'm capable. i just want some idea as to where the sensor is and what its going to take before i break out the tools.

Thanks a bunch!

Morris
Reply
Old Feb 26, 2007 | 07:49 PM
  #2  
StapleGun's Avatar
MBWorld Fanatic!
 
Joined: Apr 2005
Posts: 2,330
Likes: 0
1967 Morris Cooper "S", 1983 911SC, 1997 Toyota Tacoma, 1999 HD FXSTB, 1998 C43
Bad news on the V8 it is, it's not tough to replace though. I need to add that I dunno what engine you have. On my 113 motor (C43 - V8) it's on the driver's-side bell housing (top side of the motor). The bell housing is the flywheel housing in case that makes no sense to you. You will need a torx or allen bit, although off-hand I cannot remember the size. I remember using a 1/4" ratchet along with a couple extensions - I hope you have small hands, it helps.

I replaced mine pre-emptively since I was aware of the what happens if it fails.

Last edited by StapleGun; Feb 26, 2007 at 07:56 PM.
Reply
Old Feb 26, 2007 | 08:36 PM
  #3  
azinn's Avatar
Senior Member
 
Joined: May 2003
Posts: 398
Likes: 1
From: In A Van Down By The River
2014 RX 350 F Sport, 2007 Scion tC, 2000 ML 430 Money Pit Finally Gone! Oh Happy Day!
Originally Posted by mr1320
I've researched this site and discovered that many of you have the same problem that I have: does not start, then come back in 15-20 minutes and starts right up, once started it runs fine, no codes.

So the concensus seems to be the Crankshaft Position Sensor. I've checked with my dealer and they have a replacement for $142.80 and will pick it up today.

My question is: where is the sensor located on the engine and is it easy to replace on my own? i.e. no special tools? i would assume its on the balancer/damper or pulley. i hope its not on the flywheel side of the motor.

i'm a pretty good wrench turner as i've tinkered with cars since i was 10 so skill wise, i'd say i'm capable. i just want some idea as to where the sensor is and what its going to take before i break out the tools.

Thanks a bunch!

Morris
See http://www.mercedesshop.com/shopforu...ps+replacement
Reply
Old Feb 26, 2007 | 11:41 PM
  #4  
mr1320's Avatar
Thread Starter
Newbie
 
Joined: Jul 2002
Posts: 19
Likes: 0
From: Irvine, CA
a POS
THANKS!!!!

Reply
Old Mar 5, 2007 | 06:09 PM
  #5  
mr1320's Avatar
Thread Starter
Newbie
 
Joined: Jul 2002
Posts: 19
Likes: 0
From: Irvine, CA
a POS
ok, i finally changed the CPS. no one told me that you needed to use The Force to replace it... hahaha... i couldn't even see the sensor. its behind the driver's side cylinder head and had to go completely by feel. anyway, i did it and so far no problems. we'll wait a week before celebrating.
Reply
Old Mar 15, 2007 | 01:26 PM
  #6  
mr1320's Avatar
Thread Starter
Newbie
 
Joined: Jul 2002
Posts: 19
Likes: 0
From: Irvine, CA
a POS
Two weeks straight with no starting problems. I guess the problem is solved. Damn you CPS!!!!

Without this forum, I would have never guessed it was the CPS. Thanks guys.
Reply
Old Mar 15, 2007 | 04:31 PM
  #7  
azinn's Avatar
Senior Member
 
Joined: May 2003
Posts: 398
Likes: 1
From: In A Van Down By The River
2014 RX 350 F Sport, 2007 Scion tC, 2000 ML 430 Money Pit Finally Gone! Oh Happy Day!
Originally Posted by mr1320
Two weeks straight with no starting problems. I guess the problem is solved. Damn you CPS!!!!

Without this forum, I would have never guessed it was the CPS. Thanks guys.
Great............. good job, good to here it worked. Makes a person feel real good when they can DIY.
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 11:20 AM.

story-0
New Mercedes-AMG SUVs Arrive With NEW V8 Engine: 12 Things You Need to Know

Slideshow: Mercedes-AMG's updated GLE 63 S and GLS 63 bring a new-generation V8, subtle design revisions, and familiar supercar-rivaling performance figures.

By Verdad Gallardo | 2026-06-17 12:52:51


VIEW MORE
story-1
8 Oddball Mercedes Ideas That Actually Made it to Production

Slideshow: Mercedes has never been afraid to experiment, and some of its strangest ideas turned out to be surprisingly successful.

By Verdad Gallardo | 2026-06-10 17:43:40


VIEW MORE
story-2
Dubai Tuner Gives the Mercedes G-Class An Entirely New Look

Sideshow: A Middle Eastern tuner has transformed the Mercedes-AMG G 63 into an open-top special, replacing nearly every exterior panel in the process.

By Verdad Gallardo | 2026-06-10 15:29:50


VIEW MORE
story-3
Six Gift Ideas Your AMG Loving Dad or Grad Will Cherish

Slideshow: Six gift ideas your AMG loving dad or grad will cherish.

By | 2026-06-03 17:26:18


VIEW MORE
story-4
7 Craziest Things AMG Gas Ever Built

Slideshow: Sometimes AMG builds fast sedans. Other times, it builds twin-turbo V12 land missiles and six-wheeled off-road monsters.

By Verdad Gallardo | 2026-05-26 17:59:58


VIEW MORE
story-5
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-6
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-7
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-8
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-9
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