Unable to control steering when cornering

I was driving my Mercedes E200k avantgarde year 2007 model yesterday when while cornering on highway, the car swerved to both left & right, it appeared as if the front tyres not responding to the steering. Happened on again few minutes later on another corner and while turning at intersection. While this incident happened, a Hazard signal appeared on both occasion (the triangle with exclamation mark). Luckily no cars nearby early morning,it could have turned spinning.

Brought the car immediately for diagnostic check, the mechanic said from the scan it shows faulty on the ABS module and re

Experienced mechanics share their insights in answering this question :
Hello. On your particular vehicle that hazard light showing up is a sign that the ESP/stability control has been disabled. The system will automatically disable if it senses an error such as a bad wheel speed sensor. If the wheel speed sensor is malfunctioning the vehicle will try to correct itself but a correction may not be needed if the sensor is failing so the vehicle will be fighting against itself so to speak. Which is likely why you’re getting the feeling of instability. I suggest you have a technician check your vehicle because when the ESP light comes on it will be accompanied with an error code that a technician could read to help find a solution. You’re able to chose a technician for diagnosis and schedule an appointment here https://www.yourmechanic.com/services/service-light-is-on-inspection

How to Identify and Fix Common car Problems ?

Our sources include academic articles, blog posts, and personal essays from experienced mechanics :

The quickest way to fix this problem is to extend the steering wheel out, then tape the steering wheel several times at the top or push up with your knee from the bottom as you press the steering wheel adjustment switch in the same direction. This simple procedure will often unfreeze a stuck Mercedes steering wheel.
The power steering system on your Mercedes Benz, BMW, Porsche, Audi, or Volkswagen is comprised of several key components including a power steering pump, filter, power steering rack (pinion), fluid cooler and a power steering fluid reservoir.
Red Fluid. There are two types of fluid in your vehicle that are red, which is the transmission fluid, and the power steering fluid.
Pentosin 1405116 CHF 11S Long-Life Synthetic Hydraulic Fluid for Audi, Bentley, BMW, Chrysler, Dodge, Jeep, Mercedes-Benz, Mini, Porsche, Saab, Volkswagen, Volvo, and More; 1 Liter.
The most common reasons for free play in the steering are looseness in the steering gear itself or looseness in one or more of the steering linkage sockets. Steering box or rack and pinion that is connected to the steering wheel by the steering column.
Possible culprits could include a loose, worn, or damaged power steering belt, low power steering fluid levels, or issues with the steering gear. If there`s an issue with the power steering belt, a quick replacement can be the solution.
The most common cause of a stiff steering wheel is when you are running low on power steering fluid in your system. Often, this happens when there is a leak in the system from the pressurized hose area. Most of the time, it is due to a cracked or loose hose causing the fluid to leak out.
The average cost for a Mercedes-Benz E350 Power Steering Pump Replacement is between $727 and $816. Labor costs are estimated between $270 and $340 while parts are priced between $457 and $476.
Driving your car for extended periods without power steering fluid can damage the pump. While there`s nothing that physically stops you from driving your car if you have a power steering fluid leak, once the level drops, your pump runs dry. This causes increased friction and heat and can quickly cause expensive damage.
Having power steering is essential for driving. Not only can driving without it damage your car, but it can also endanger other drivers on the road. For this reason, it`s illegal in all 50 states to drive without power steering. Power steering enables you to turn your steering wheel easily and quickens reaction time.
The power steering system uses a pump so the fluid can flow for smooth steering. If there is a low amount of fluid present, air will start to circulate through the steering mechanism and make strange sounds when you turn the steering wheel. To prevent this, simply top up your fluid reservoir with power steering fluid.

Relevant Questions and Answers :

the most relevant questions and answers related to your specific issue

Very loud pop when turning sharp left leaking transmission or power steering fluid where steering column meet rack
ANSWER : Hi there. If everything else has already been installed from the donor vehicle then it sounds like the high pressure hose is all that you need to install. The hardest part of doing this is the routing. One thing you may also want to double check is that the donor vehicle and your 2003 Escape have the same rack. There are different models depending on the model and the size of your wheels. You need to install the pressure line first, but if it does not line up then you may have the wrong rack installed. If you would like some assistance installing this hose, consider YourMechanic, as a certified mechanic can come to you to [replace your high pressure steering hose] https://www.yourmechanic.com/services/power-steering-pressure-hose-replacement

ABS, ESP, EBR malfunction
ANSWER : You’re getting into an area that is kind of a dark art when you’re getting these kinds of codes. While I don’t know any of the symptoms that the car is exhibiting, I can tell you that failure in one of the control units can lead to codes showing up in the others and the ABS, ESP is a likely culprit since it interprets the wheel speed signals and sends the information to the other modules. You’re right that the module has to be coded, and I don’t think that Snap On has the software for that so the only place to go is the Star Diagnostic. (The consumer version of the Mercedes SDS ) You can Contact YourMechanic and see if anyone in your area has the appropriate equipment for this. Otherwise, this may be a case that would best be consigned to the Mercedes Dealer.

Power steering is hard, softens when I accelerate
ANSWER : Well given the symptoms, it sounds like the power steering pump is not putting out adequate pressure. When you replaced the power steering pump, did you use an OEM pump? If not, I would suggest having the power steering pressure checked, and replace the pump with an OEM pump if necessary to ensure the pump is good quality. Also, I know you said the pipes have been replaced, but does that include the pressure hose between the pump and the steering box? If not, that could be an issue as well.

You should also check the front end steering and suspension components, as a failing steering rod or ball joint could be binding, causing the steering to be stiff until it has enough pressure to overcome the bind.

If you want to have the steering problem thoroughly diagnosed, you can contact a qualified professional, such as one from YourMechanic.

Steering wheel won’t lock. Yellow steering lock warning on dash. Only comes on when removing fob.
ANSWER : Hi there. The issue seems to be the shifter interlock solenoid may be malfunctioning causing the steering wheel lock to not release or not engage.

I suggest having the computer scanned for any codes that would be stored or pending for the steering system as there is a warning light on for the steering lock system. This will give you the correct item to check when dealing with your steering wheel not locking. If you need further assistance with the steering wheel not locking, then seek out a professional, such as one from Your Mechanic, to help you.

Could the power steering pressure sensor cause my steering wheel to be hard or hard to steer?
ANSWER : Hello. The pressure switch (or "sensor") on your vehicle supplies a signal to the engine computer to increase engine idle speed as the power steering line pressure increases. If the switch were bad, what you would notice is the engine stalling or idle speed dropping very low as you turn the wheel toward the extreme left or right position.

If the engine is not slowing or stalling when you turn the wheel, then the switch is probably OK. Among the causes of excessive steering effort are very low tire pressure, low power steering fluid or trapped air in the system, damaged or loose power steering belt, and damaged steering rack.

If you would like to have this resolved, a certified professional from YourMechanic can diagnose your steering issue and follow through with needed repairs.

Problem with steering on one side only.
ANSWER : Hi there. The power steering system has a control valve that sends the fluid through the rack and pinion system. The valve maybe plugged up and causing the fluid to not return to the reservoir fast enough.

For the alignment issue, check all of the suspension and see what is loose or could be damaged. I recommend having an alignment performed on the vehicle after replacing any suspension or steering parts. If you need further assistance with your alignment, then seek out a professional, such as one from Your Mechanic, to help you.

Unable to control steering when cornering
ANSWER : Hello. On your particular vehicle that hazard light showing up is a sign that the ESP/stability control has been disabled. The system will automatically disable if it senses an error such as a bad wheel speed sensor. If the wheel speed sensor is malfunctioning the vehicle will try to correct itself but a correction may not be needed if the sensor is failing so the vehicle will be fighting against itself so to speak. Which is likely why you’re getting the feeling of instability. I suggest you have a technician check your vehicle because when the ESP light comes on it will be accompanied with an error code that a technician could read to help find a solution. You’re able to chose a technician for diagnosis and schedule an appointment here https://www.yourmechanic.com/services/service-light-is-on-inspection

Power steering stiff when cold
ANSWER : Hello. This can be a sign of a bad pump, but most of the time it is caused by contaminated fluid. If the fluid is old or has any moisture in it then this will occur. I usually flush out the power steering fluid first. I also check the belt. Once it has new fluid and if the belt is fine, then I double check the symptoms. If it continues, then I replace the pump. If you need to have this done, consider YourMechanic, as a certified mechanic can come to your home or office to diagnose the steering and move forward with the proper repairs.