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2000 Mercedes Benz ML320
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5 Posts
Discussion Starter · #1 ·
I have a ML320 2000. It lost acceleration, power. I hooked up a code reader it said P301, P304 CPS sensor was changed didn't help at all. Replaced the fuel filter, ran ok until it warmed up then it chugged and coughed and died. Fuel pump seems to have a lot of pressure. Any help would be appreciated.:surrender:
 

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Outstanding Contributor
2006 ML500 2002 ML320
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17,659 Posts
Please update your profile in USER CP to include the year and model of your truck, also your geographical location.

In your first post on this problem, you stated that it started right after filling up your tank. That would lead one to believe that the problem stems from fuel qantity or fuel quality. Since you have already changed the fuel filter that eliminates one issue on the quantity side, the other being the fuel pump. So, you would have to have the fuel pressure checked in order to rule out that possibility. Your felling about it having enough fuel pressure does not count, it's what the pressure gauge tells you that counts.

On the quality side, there is not much that can be done other than removing the fuel from the tank. If the fuel pressure is not the problem, try two or three bottles of dry gas and see if that helps the problem.
 

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2000 Mercedes Benz ML320
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5 Posts
Discussion Starter · #4 ·
Well she is all back together. I ended up replacing the fuel pump too. That's alot of work! I picked up one at a salvage yard for 110. and she seems all better. Thanks to this site I saved a lot of money. MB wanted 508 for the pump, 158 for the filter and 800for estimated labor. Thank you for your help.
 

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'07 C280 4matic, '06 530i, '98 ML320
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1,562 Posts
kellymaureen, since you went thru the hard work of removing and replacing the fuel pump, you should've replaced it with new pump (MB genuine pump, from an on-line store, definitely less than $508). Now you don't know how long that used pump will last. well, too late for that thought :)
 

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2002 ML55 AMG, 2005 Chrysler Crossfire Coupe Limited, 1999 C280
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4,714 Posts
I'm glad you finally resolved your problem kellymaureen.:thumbsup:

I read in another thread, in which you posted, that your truck has 275,000 miles on the odometer!:eek:

That's great news for those of us who want to drive this thing till it can go no more.:)

I'm interested to know what parts/fluids/maintenance/repairs you've done on your truck with that mileage.
 

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'07 C280 4matic, '06 530i, '98 ML320
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1,562 Posts
kellymaureen, sorry I am diverting away from your thread/topic.

FAR, where is your side marker light (on the front quarter panel)? ML 55 doesn't have a side marker lamp? or you had it removed it?
 

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2002 ML55 AMG, 2005 Chrysler Crossfire Coupe Limited, 1999 C280
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4,714 Posts
....FAR, where is your side marker light (on the front quarter panel)? ML 55 doesn't have a side marker lamp? or you had it removed it?
Hello pcy!

The side marker light on all MLs was moved from the front quarter panel to the side mirrors from 2002 onwards.

My ML55 is a 2002 model.

Enjoy the ML:thumbsup:
 
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