Crank Position Sensor
Member
Joined: Mar 2006
Posts: 123
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From: Shotts,Scotland.
1995 c220 auto
Haven't replaced one on your engine type , but look here for position,usually very awkward to access.http://www.detali.ru/cat/oem_mb2.asp...SGR=075&SGN=04
Geo.
Geo.
Thread Starter
Super Member
Joined: Mar 2005
Posts: 648
Likes: 5
From: Houston, Texas
2017 G63 AMG, 2019 G550
Originally Posted by shandy2550
Haven't replaced one on your engine type , but look here for position,usually very awkward to access.http://www.detali.ru/cat/oem_mb2.asp...SGR=075&SGN=04
Geo.
Geo.
Thread Starter
Super Member
Joined: Mar 2005
Posts: 648
Likes: 5
From: Houston, Texas
2017 G63 AMG, 2019 G550
Well, on my way to the dealer this morning my car died on me twice. I was able to get it started 20 minutes after each stall, but man it was a problem! 
The car is at the dealer to get hooked up to their diagnostic machine and hopefully to resolve the problem by the end of today. Thank you all for your help. I will let you know what happens.
The car is at the dealer to get hooked up to their diagnostic machine and hopefully to resolve the problem by the end of today. Thank you all for your help. I will let you know what happens.
Thread Starter
Super Member
Joined: Mar 2005
Posts: 648
Likes: 5
From: Houston, Texas
2017 G63 AMG, 2019 G550
It's amazing what effect a little sensor like the crank position sensor has on our cars. Mine is a 2001 C240 and the sensor is actually located in the front of the engine, I had the SA show it to me. After they hooked it up to diagnostic machine they determined that the only problem was the CPS. I thought it was the alternator as well because of how it stalled out on me twice this morning-I was wrong. Apparently it is a common problem and towards the end of the sensor's life it will stop working if it becomes hot under normal temperatures which is after the car has been on for at least 30 minutes. The sensor was only $105 and the dealer was able to fix the problem today! The car acts like it did on the first day that I bought it! Thanks for everyone's help on this forum
Senior Member
Joined: Apr 2004
Posts: 393
Likes: 2
From: Mesa, AZ
2011 E350 Bluetec, 1996 S320 & 2006 E320 CDI Sold to my son & 2017 GMC 2500 Diesel Pick up
Shandy, would this sensor be in about the same place on a '96 s320. Sounds just like the problems I've been haveing.
Rod
Drive on
Rod
Drive on
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Junior Member
Joined: Aug 2006
Posts: 17
Likes: 0
From: south texas
2001 c240
I know this is an old thread, but I just replaced my sensor in 01 c240. It was difficult to get to. I have skinny hands and with some dish soap, I was able to squeeze my hand between the firewall and the rear cylinder. The bolt that is holding the sensor is a star head, so you will need star sockets. It took some time to hit the bolt, because of the limited space. I was finallly able to get it off and carefully remove. I am glad I didn't drop the bolt when removing. You really need to be careful. When installing the new one, the sensor is round so you have to move it to line up the hole for the bolt. This took me a little time because I was straining the tips of my fingers to position it. Just not a lot of room to work. So far so good, the car runs fine, no more stalling at the light. I bought the part from NAPA for $80. Had to get the star sockets from Harbor Freight for $8. It can be done, but like I said, small hands saved me. I wonder how the MB mechs do it? Good luck to anyone trying. 
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MBWorld Fanatic!
Joined: Nov 2001
Posts: 5,854
Likes: 197
From: Huntington Beach, Ca.
'17 Jaguar XF
Ratchet, long extension, u joint coupler, short extension, star socket, magnetic pick up stick (or so I read 
). Many part replacements are harder the first time not knowing the proper tool or combination of tools and approach. 15 minute job.
). Many part replacements are harder the first time not knowing the proper tool or combination of tools and approach. 15 minute job.
Junior Member
Joined: Aug 2006
Posts: 17
Likes: 0
From: south texas
2001 c240
I guess the MB techs probably would not use the dish soap method
. I am just glad I was able to do it and they didn't. Learned a lot, hope I don't have to do it any time soon. Thanks forum.
. I am just glad I was able to do it and they didn't. Learned a lot, hope I don't have to do it any time soon. Thanks forum.
Last edited by ragu; Sep 1, 2008 at 08:20 PM.
MBWorld Fanatic!
Joined: Jan 2007
Posts: 1,152
Likes: 29
From: Sydney, Australia
190D 2.5 (x2), 190E 2.6, W202 C240,W202 C43 (C55), W210 E55, W212 E250CDI
The V6 and V8's when installed in a W203 or W209 are very difficult due to the engine being mounted a bit further back than other chassis's. If you remove the air intake pipe from the throttle body then you can reach from the center of the engine rather than the side which gives a bit more space. Still difficult though if you haven't done one before. This is the only way to do it with the M272 and M273 in some chassis's now.
Newbie
Joined: May 2009
Posts: 10
Likes: 0
2001 C240
I know this is an old thread, but I just replaced my sensor in 01 c240. It was difficult to get to. I have skinny hands and with some dish soap, I was able to squeeze my hand between the firewall and the rear cylinder. The bolt that is holding the sensor is a star head, so you will need star sockets. It took some time to hit the bolt, because of the limited space. I was finallly able to get it off and carefully remove. I am glad I didn't drop the bolt when removing. You really need to be careful. When installing the new one, the sensor is round so you have to move it to line up the hole for the bolt. This took me a little time because I was straining the tips of my fingers to position it. Just not a lot of room to work. So far so good, the car runs fine, no more stalling at the light. I bought the part from NAPA for $80. Had to get the star sockets from Harbor Freight for $8. It can be done, but like I said, small hands saved me. I wonder how the MB mechs do it? Good luck to anyone trying.
Do you recall what size socket was required to remove the CPS? By any chance do you know if it also fits the bolt for the cam position sensor (on the front of th engine)? I was going to use this as a check before I start my engine acrobatics... It seems I have a bad crankshaft position sensor too (at least that's the error code I get from the scanner).
Thanks so much (hope you are still reading).
Eric
Senior Member
Joined: Apr 2004
Posts: 393
Likes: 2
From: Mesa, AZ
2011 E350 Bluetec, 1996 S320 & 2006 E320 CDI Sold to my son & 2017 GMC 2500 Diesel Pick up
Eric -go to AutohausAZ for your parts if you haven't bought it yet. much better prices. Half of what he said he spent. I buy all my parts there, they ship very fast.
Makes > 2001 Mercedes > C240 > sensor > Crankshaft Position Sensor
Part Number Brand / Description / Restrictions List Core Your Price Qty Select
0261210170
Bosch
Crankshaft Position Sensor; Rear; EZL Sender at Rear of Engine
Please note, this sensor has one clip-on lock notch for harness connection. 1 per car. Limited availability. $40.10
Makes > 2001 Mercedes > C240 > sensor > Crankshaft Position Sensor
Part Number Brand / Description / Restrictions List Core Your Price Qty Select
0261210170
Bosch
Crankshaft Position Sensor; Rear; EZL Sender at Rear of Engine
Please note, this sensor has one clip-on lock notch for harness connection. 1 per car. Limited availability. $40.10
Newbie
Joined: May 2009
Posts: 10
Likes: 0
2001 C240
Thanks Rod.
I checked Autohaus and you are right, best price around by $12... Best price I could find was $62... Locally it's $86.
I added a set of wiper blades (~$10) to bring my order over $50, so the shipping was free (would have been around $8, so for $2 more, I have a new set of blades.
Off to buy the star socket I need now. I figure it will end being a set from Harbor Freight.
Thanks for the tip.
Eric
I checked Autohaus and you are right, best price around by $12... Best price I could find was $62... Locally it's $86.
I added a set of wiper blades (~$10) to bring my order over $50, so the shipping was free (would have been around $8, so for $2 more, I have a new set of blades.
Off to buy the star socket I need now. I figure it will end being a set from Harbor Freight.
Thanks for the tip.
Eric
Newbie
Joined: May 2009
Posts: 10
Likes: 0
2001 C240
New part installed. Running like a top. BTW, the socket size is E8.
Pictures in this thread/post:
https://mbworld.org/forums/c36-amg-c...ml#post3519871
Pictures in this thread/post:
https://mbworld.org/forums/c36-amg-c...ml#post3519871
Newbie
Joined: Jul 2012
Posts: 1
Likes: 0
2001 C240
I don’t see any recent posts but the thread is still open. Maybe there’s a new thread, but I just replaced the cps on my C240 year 2001 and am happy as a pig in s**t. I wouldn’t have been able to do it without this site.
Although I knew what the part looked like, I couldn’t find it on the engine. This link cleared that up ( found on another thread): http://pingelblog.blogspot.com/2008/06/c43-amg-crankshaft-position-sensor.html Location is rear of engine, driver side by the firewall. It’s at about a 45 degree angle. I can’t see any other way of replacing this thing without getting your hand down there to remove the wire and to hold the socket steady to find the bolt by touch and then to ensure it catches the bolt. It is a tight fit. I used grease instead of dishwashing soap on my hand and it helped a great deal. For me, removing the wire first, by squeezing the clip worked well. More room to maneuver. Used a ¼” E8 female torx socket to remove the bolt. I used a socket wrench because it gave me more torque to break the screw, which was in there pretty tight. Once the screw was out, the part came out easily and the rest was smooth sailing. I noticed the bolt had some blue residue on the thread, so I put a drop of Proloc removable thread lock on it before reinstalling it.
Btw, the car stalled out in a parking lot whil my wife was driving. Couldn’t get it to re start. The engine would turn but not start. She called AAA. I show up and waited with her. After a while, I tried it again and it fired up. Cancelled the tow and drove home. Check engine light is on. Bought a code tester for about $35.00 and got the code po335 with further text that it was the cps circuit malfunction. The rest is history. Check engine light is gone. Part cost about 50 bucks at Autozone. Thanks again to all the contributors as all the different bits of info helped greatly. Replaced an alternator a couple of years ago with this site’s help as well.
Although I knew what the part looked like, I couldn’t find it on the engine. This link cleared that up ( found on another thread): http://pingelblog.blogspot.com/2008/06/c43-amg-crankshaft-position-sensor.html Location is rear of engine, driver side by the firewall. It’s at about a 45 degree angle. I can’t see any other way of replacing this thing without getting your hand down there to remove the wire and to hold the socket steady to find the bolt by touch and then to ensure it catches the bolt. It is a tight fit. I used grease instead of dishwashing soap on my hand and it helped a great deal. For me, removing the wire first, by squeezing the clip worked well. More room to maneuver. Used a ¼” E8 female torx socket to remove the bolt. I used a socket wrench because it gave me more torque to break the screw, which was in there pretty tight. Once the screw was out, the part came out easily and the rest was smooth sailing. I noticed the bolt had some blue residue on the thread, so I put a drop of Proloc removable thread lock on it before reinstalling it.
Btw, the car stalled out in a parking lot whil my wife was driving. Couldn’t get it to re start. The engine would turn but not start. She called AAA. I show up and waited with her. After a while, I tried it again and it fired up. Cancelled the tow and drove home. Check engine light is on. Bought a code tester for about $35.00 and got the code po335 with further text that it was the cps circuit malfunction. The rest is history. Check engine light is gone. Part cost about 50 bucks at Autozone. Thanks again to all the contributors as all the different bits of info helped greatly. Replaced an alternator a couple of years ago with this site’s help as well.
