Skip the auto shop - Our mechanics make house calls

Q: SUV will not accelerate sporadically and has no power

asked by on

SUV was running fine until had a regular oil change. After that SUV had sporadic bouts of no acceleration otherwise ran fine. When I mean no acceleration I mean that you could put the pedal to the floor and it would only accelerate much later like a 1-5 minute delay. This car new was to go from 0-60 in under 9 seconds if I read everything correctly. No check engine light ever came on until about 2 weeks ago when it gave a code to the Advance Auto Parts guy saying no Turbo Boost. This is a 2008 Mercedes ML 320 CDI (Diesel) 4 matic and I need it to run because I have to go to work regardless of the weather. It has a turbo diesel system. I have all sensors replaced, I run the best diesel gas, and no one can figure out the problem. Worse now since yesterday I went to start the SUV and it started but would not complete the process to stay running. I think you refer to this as the engine would turn over but that was it. Please help winter weather is coming and I have to work. Thanks much.

My car has 183000 miles.
My car has an automatic transmission.

A: Hi there: To be completely honest, there c...

Hi there:

To be completely honest, there could be multiple issues with your 2008 Mercedes-Benz that are causing the symptoms you’re describing, ranging from something simple like a crankshaft position sensor to the throttle position sensor or complex issues with the turbo on your ML320.

The best way to simplify the process for diagnosing this problem and ensure the right repairs are completed is to have a mobile mechanic from YourMechanic visit you and start with a Check Engine Light inspection. Even if the light is not illuminated, it’s highly possible that error codes are stored in the vehicle’s ECU. This inspection will allow the mechanic to pull those codes and give them a starting point to diagnose the issues and recommend the right repairs.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: when inserting the key it will not engage to turn the engine over

Hello, thank you for writing in. Due to the fact the other key is working, we know that the ignition is not the problem. Typically a key fails to work when there is physical damage to it. If this is...

Q: The rear hatch lock does not work with the remote.

Ensure the rear hatch opens with the outer and inner handles. If so then the problem exists in the remote transmitter as long as the other remote functions work lock/unlock. As long as you are sure the lock or unlock...

Q: What is P0335 Crankshaft Position Sensor A Circuit and where is it located?

Hello - this message (P0335) indicates that the crankshaft position sensor is failing, causing the "cutting off" you have already noticed. It is located on the bottom of the engine/transmission interface (drivers side of the vehicle). To avoid any unnecessary...

Related articles

What Causes Hoses to Leak?
While the largest part of your engine is mechanical, hydraulics plays a significant role. You’ll find fluids at work in a number of different areas. Your car's fluids include: Engine oil Transmission...
How Long Does a Heater Control Valve Last?
Keeping the right amount of coolant in a car is essential in keeping the engine at the right temperature. Failing to have the right amount of coolant or even bad elements...
How to Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...