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

Acceleraton issue

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Old Dec 29, 2017 | 07:05 PM
  #1  
FUMB's Avatar
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ML320
Acceleraton issue

Hi guys,

I have a 2001 ML320 which is having trouble accelerating. I have changed MAF and replaced battery. Hubby says it's fine but as the driver, I can see/feel the issue. Even my 15yo can tell when the acceleration power has gone. It doesn't shut down or stop, it is just so slow to accelerate. I am at my wits end with the car! Any ideas on what I can do next? I'm trying to avoid a dealership as they charge astronomical prices for minimum work. My local guy is away for a few weeks and I can't survive our Summer holidays with no car.

Thanks in advance.
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Old Dec 30, 2017 | 05:44 AM
  #2  
Maj. Dundee's Avatar
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From: Bronx, N.Y.
2002 ML 320 & 2006 ML500
What happens after 25 MPH?

Why did you change the battery and MAF?

Did the problem occur after you changed the battery?

Last edited by Maj. Dundee; Dec 30, 2017 at 06:44 AM.
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Old Dec 31, 2017 | 04:34 AM
  #3  
vmystikilv's Avatar
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From: Dallas, TX
Range Rover
Is the check engine light on?

Things to suspect
1. Full filter or pump
2. clogged/bad cats
3. Clogged Air intake filter
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