Dt: intermittent delay of 7 seconds when given gas. The vehicle has been in the dealership 6 times, and they still haven't been able to figure the problem out. The car has had this problem for 2 years. The car is worse when it's hot outside and when the consumer is pulling out. The car doesn't have the problem when it's cooler outside. The dealership has changed out the pedal value sensor, a slide mechanism for the intake manifold, a wiring harness and fan for the ECM, the fuel pump and fuel filter with upgrades, the ECM, and now the wiring harness has to be changed since it was built in germany.
1999 Mercedes Benz ML320: fuel pump failure
7 of the 125 complaints about the 1999 Mercedes Benz ML320 describe fuel pump failure.
- owner complaints
- 7
- of this car's complaints
- 6%
- recalls
- 0
Is there a fix? No recall or service bulletin covers this area of the car yet.
Fuel pump failure by model year
What owners say
The computer let the consumer know that brake pads were defective, while taking the vehicle out on a test drive caliper locked up. Prior to this happening vehicle was starting in third gear, instead of first gear. It difficult to move out in traffic. Dealer/mechanic experienced the same problem, and replaced the fuel pump, and fuel line.
Vehicle has a faulty fuel pump.*mr the consumer received a recall letter regarding the power steering, however the consumer did not state if the vehicle experienced a failure. *jb
Based on a dealer reccomendation, I have become aware the mercedes benz has been conducting and unpublicised "campaign" to advise owners of certian of the ml series suvs of the desireability of "upgrading", at the owners expense, the fuel system including filters and lines. This is apparently in response to a number of fuel filter and fuel pump failures, ascribed by mercedes to "poor quality u.s. Fuel" these failures have the effect of immobilizing the car, without warning. These unexpected stoppages cn have very serious saftey implications if they occur in a moving traffic flow situation. Mercedes is well aware of this problem but has not directly informed owners and takes the position that it is not a saftey issue and therefore not subject to a recall. I believe that a documented problem, ascribable to faulty design or materials that can lead to a sudden and unexpected loss of power is a very serious hazard and should be corrected by the manufacturer.
Consumer states fuel pump failed three times.
Vehicle has experienced a no start condition. Dealer has replaced fuel pump twice, but defect still occurs.
Noticed poor gas mileage. Contacted dealer, and replaced fuel sending unit. Second time replaced a fuel pump . Also, engine check light came on.
Related recalls
No recalls on record for this model year.
Questions about the 1999 Mercedes Benz ML320 fuel pump
Is fuel pump failure a common problem on the 1999 Mercedes Benz ML320?
7 of 125 owner complaints about the 1999 Mercedes Benz ML320 (6%) mention fuel pump failure. The model year with the most reports is 1998.
Is there a recall or service bulletin for this on the 1999 Mercedes Benz ML320?
There is no recall or service bulletin for this area of the car on record.
Other symptoms on the 1999 Mercedes Benz ML320
Power steering loss 9Loss of power 8Door locks 5Stalling 5Sudden acceleration 5
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