Q: Mercedes Benz 1997 E230 stumbling engine

asked by on

I own a second-hand Mercedes Benz 1997 E230 WD210.

Occasionally, while driving, the car has had some rough stumbling i.e. choking when accelerating. This happens even at high speed, 80-100kph. Once, it even caused the car to turn off its engine when accelerating out of a traffic light.

I have noticed that the problem seems to arise when the fuel tank is more than 75% full.

In the past 18 months, I have had the fuel pump, fresh air intake and camshaft sensor replaced. It seems that the problem has improved, but not disappeared entirely, causing me some anxiety when driving it over long distances.

What should be the problem?

My car has 18000 miles.
My car has an automatic transmission.

The information given states two different vehicles. I will be addressing the first (E230). Its possible with the age of the vehicle that you hare having several issues. You are correct to address sensors, air, and fuel. All of them can cause issues like these.

Lets start with fuel. When you had the fuel pump changed, did you also replace the fuel filter? This should have been done at the same time. The fuel injectors can also be dirty and may need to be cleaned.

If you have not run the vehicle for codes, you will want to do that almost immediately. That way if the computer is picking up on something going wrong, you can start there with your diagnosis.

Oxygen sensors can fail as well causing drivability issues. Again, most of these sensors will trip a code in the computer. However some will not, or some may not be testing bad enough at this point to sound an alarm.

Start with trying to maintain some of the important fuel system components and test everything related to it as you proceed. Start with the simple fixes, and work your way to the more complicated systems. If you would like to have an expert pinpoint the issue in person, a qualified professional from YourMechanic can come to your car’s location to diagnose the hesitation issue so that this gets repaired correctly.

Was this answer helpful?
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
  1. Home
  2. Questions
  3. Mercedes Benz 1997 E230 stumbling engine

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: Jerks when downshifting and slow. 2005 Mercedes Benz E55

You may have a broken motor or transmission mount that will allow the transmission or engine to move excessively. Also another possible cause is the transmission torque converter sticking when commanded to release. There are technical bulletins to flush the...

Q: How do you start car after running out of exhaust fluid?

Hi there. There is a sensor in the diesel exhaust fluid tank that measures how much fluid is in there. This is why the dash can tell you how much fluid is remaining in the tank. The engine will not...

Q: I think the immobilizer has gone on.

The engine will not start when the immobilizer system is active. Check the key to the vehicle and see if there is a remote to it. If there is a remote, then I suggest replacing the battery in the remote...

Related articles

How Do Power Car Windows Increase Passenger Safety?
Power windows are responsible for approximately 2,000 emergency room visits every year. When a power window closes, it exerts enough force to bruise or break bones, crush fingers, or restrict an airway. Though...
How Long Does a Distributor O Ring Last?
The distributor is part of the ignition system in your vehicle and its purpose is to route high voltage from the ignition coil to the spark plug. The spark plug then...
How Much Does a Mechanic Make in Vermont?
Automotive technician jobs in Vermont have an average mechanic salary of $37k, with some mechanics earning a salary of $53k.