Ml320 Will not start
Newbie
Joined: Feb 2009
Posts: 2
Likes: 0
ML320
Hi my name is Leo
I have a 2000 ml320 my SUV cranks but does no start.
I changed the crank sensor and the cam sensor but I still can not start it please i need help
thank you
I have a 2000 ml320 my SUV cranks but does no start.
I changed the crank sensor and the cam sensor but I still can not start it please i need help
thank you
Super Member
Joined: Apr 2003
Posts: 690
Likes: 33
From: Bay area - California
2000 ML320 2006 SLK 350
Does the ECU throw any codes?
It could be the fuel pump.
The Crank Sensor and the fuel pump failures have identical symptoms. Crank, crank - no start..except that the CPS failure will cause the engine to start when dead cold.
You could also be getting cylinder misfires, which could mean foul spark plugs or bad ignition wires..
How many miles on the ML? Were the plugs/wires replaced at 100K miles?
Lastly, was the fuel filter replaced between 60-75K miles? A choked fuel filter could also cause the same symptom..
And also, as mentioned above, the key could be a cause of it too..
The Crank Sensor and the fuel pump failures have identical symptoms. Crank, crank - no start..except that the CPS failure will cause the engine to start when dead cold.
You could also be getting cylinder misfires, which could mean foul spark plugs or bad ignition wires..
How many miles on the ML? Were the plugs/wires replaced at 100K miles?
Lastly, was the fuel filter replaced between 60-75K miles? A choked fuel filter could also cause the same symptom..
And also, as mentioned above, the key could be a cause of it too..
Newbie
Joined: Oct 2009
Posts: 1
Likes: 0
2002 ml 320
Did you change out the key or take it to dealer?
Newbie
Joined: Feb 2009
Posts: 2
Likes: 0
ML320
It was under extended warranty at the time and had it towed to the dealer. It was embarrasing at the time to find out it was just the key but I would never had thought that a key would act that way. 
The dealer programed a new key and all was well.
The dealer programed a new key and all was well.
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Junior Member
Joined: Oct 2009
Posts: 62
Likes: 0
2005 E500 4matic, 99 ML 430, 90 E300
You are going to hate that job.
It is behind the driver side rear fender liner. Do you have the updated filter already? If not
you will need the new filter and new fuel lines that come with it.
Also to do this the rear seat has to be unbolted at the rear and tilted forward in order to
access the fuel pump where the fittings for the new lines go. I can get part numbers and
probably post a diagram. Autohausaz.com had some of the better prices I have seen for
OEM stuff on the fuel system.
It should be a different thread than this however. We are going off topic.
It is behind the driver side rear fender liner. Do you have the updated filter already? If not
you will need the new filter and new fuel lines that come with it.
Also to do this the rear seat has to be unbolted at the rear and tilted forward in order to
access the fuel pump where the fittings for the new lines go. I can get part numbers and
probably post a diagram. Autohausaz.com had some of the better prices I have seen for
OEM stuff on the fuel system.
It should be a different thread than this however. We are going off topic.
Junior Member
Joined: Oct 2009
Posts: 62
Likes: 0
2005 E500 4matic, 99 ML 430, 90 E300
You will have to pull off the drivers rear wheel to lift up the edge of the wheel arch liner to get a good peek at the filter.
Then I can post the correct lines if needed. If it is the updated one then you just need the filter and do not have to access the top of the fuel pump/sender under the back seat. Also you save money on the fuel lines.
Member
Joined: Oct 2009
Posts: 80
Likes: 0
From: Orange, CA
Mercedes ML430
it is a 2001 ML 430. I bought the piece of crap CPO so I dont know if it is the original. My back is hurting so I cant look at what you asked me to. Thank you for your help. From what I have heard it is MOST likely to be the CPS since it starts when cold. Would u agree? thanks
Newbie
Joined: Oct 2009
Posts: 3
Likes: 0
ML320
Help
Hi , I have a 2000 ML320. I had the same problem as Leo100. I changed CPS and it worked fine for five months. But now after trying a few times to start it I finally did (changed the battery),it worked for a few minutes and then died....tried after two days , same thing. Please help ???
Member
Joined: Oct 2009
Posts: 80
Likes: 0
From: Orange, CA
Mercedes ML430
Hi , I have a 2000 ML320. I had the same problem as Leo100. I changed CPS and it worked fine for five months. But now after trying a few times to start it I finally did (changed the battery),it worked for a few minutes and then died....tried after two days , same thing. Please help ???
Newbie
Joined: Oct 2009
Posts: 3
Likes: 0
ML320
Racerx18691
Do you think that could be a CPS issue? The engine starts , works for a few minutes and then dies. Next try I cannot start the engine. As I mentioned, I tried after two days and the same thing happend??
Thanks for the post.
Do you think that could be a CPS issue? The engine starts , works for a few minutes and then dies. Next try I cannot start the engine. As I mentioned, I tried after two days and the same thing happend??
Thanks for the post.
Member
Joined: Oct 2009
Posts: 80
Likes: 0
From: Orange, CA
Mercedes ML430
as far as I know yeah. I need to replace my CPS as well. As far as starting then dying a few minutes later? Could be a failed or failing CPS, could also be the alternator, loose battery terminals. Test your battery first. Get a new CPS using the warranty from the person or company you bought the CPS from. Like I said if it is a reputable company they should offer 12 month warranty. Other than that, wait and see if you get any other or different opinions from others on this thread. You can call your mercedes dealer and ask to speak to a mechanic to give you their opinion. I have been told "we dont do that" I said "well you did last week so let me talk to a mechanic" LOL and they did. The bis question is, is it the CPS causing it to die. Shouldn't be the battery because it turns over and starts. Wait for others' opinion.
Member
Joined: Oct 2009
Posts: 80
Likes: 0
From: Orange, CA
Mercedes ML430
when u ask them, u will need to tell them whether it happens when engine is cold, just been driven and still hot, just been driven and still warm, etc. On mine it only starts when cold.
Newbie
Joined: Oct 2009
Posts: 3
Likes: 0
ML320
Well , I had a CPS problem five months ago, and they fixed it (changed the CPS-at least that's what they told me). Before changing the CPS I was able to start when engine was cold and drive it for a while till it got hot. But now , the engine starts and after 2-3 minutes engine dies. The mechanic told that this is a fuel pump problem(he tested it with some spray , I don't know what was that). Alternator could be the issue , because after I changed the battery it worked but died after a few minutes. I really don't know what to change first.I think that you all know when you ask a dealer for help they just want to change almost every part in the car.
Member
Joined: Oct 2009
Posts: 80
Likes: 0
From: Orange, CA
Mercedes ML430
Well , I had a CPS problem five months ago, and they fixed it (changed the CPS-at least that's what they told me). Before changing the CPS I was able to start when engine was cold and drive it for a while till it got hot. But now , the engine starts and after 2-3 minutes engine dies. The mechanic told that this is a fuel pump problem(he tested it with some spray , I don't know what was that). Alternator could be the issue , because after I changed the battery it worked but died after a few minutes. I really don't know what to change first.I think that you all know when you ask a dealer for help they just want to change almost every part in the car.
Newbie
Joined: Jan 2016
Posts: 1
Likes: 0
ML350
ML350 wont start
Hi gents, I got stuck this morning when my ML350 lost raves (RPM) and shut down. I tried to start it but couldn't. It cranks quite alright but will not start. No fault codes are present on the dash.... Please help
MBWorld Fanatic!
Joined: Oct 2011
Posts: 7,107
Likes: 765
From: Bronx, N.Y.
2002 ML 320 & 2006 ML500
Crank the eng. and watch the tachometer and see if the needle moves to at least 200 RPM's.
If it doesn't you will have to replace the Crankshaft Position Sensor.
If it doesn't you will have to replace the Crankshaft Position Sensor.
MBWorld Fanatic!
Joined: Oct 2011
Posts: 7,107
Likes: 765
From: Bronx, N.Y.
2002 ML 320 & 2006 ML500
Everything depends on how you changed the battery. If you left the key in the ignition while you removed and installed the battery cables, you might have toasted your key, ECM or AAM.
Think carefully as to how you did this.
