Q: Squealing noise, runs bumpy over 50 mph - 2005 Mercedes-Benz ML500

asked by on September 11, 2016

My car has been making awfully loud squealing sounds ever since I went on a longer trip. This becomes noticeable during driving, both when I put it in reverse or drive forward. There is no noise when I start the engine though. In addition to this, the car is running sort of bumpy each time I increase the speed over 50 mph. What could it be?

Hi! A good place to begin is with a thorough visual inspection performed on your Mercedes. Squealing sounds under the hood frequently come from accessory belts. This can be due to age or a worn tensioner. That’s one of those things that is difficult to say for sure unless one is standing there in person seeing and hearing it! The bumpy feeling may be tire imbalance due to worn out tires, a need for re-balancing, or worn out shock absorbers. If you would like, a certified technician from YourMechanic can come to your home or office too diagnose the squealing noise and complete any necessary repairs.

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


Experienced Mechanic?

Earn up to $70/hr

What others are asking

How do I turn on the heated seats?
The heated seats are a luxury feature that heat the front seats. This provides maximum comfort for the driver and the front passenger. To turn on the heated seats, press the heated seat button, which is a picture of a...
Car not moving when in gear
If the shifter linkage has failed or broke it will not allow the transmission to be put into gear. The transmission has multiple clutch packs that control the different gears that are used while driving. Inside these clutch packs are...
Short-term fuel trim swinging plus or minus 10% during driving
Yes, this is normal when you accelerate and decelerate. Your vehicle will add fuel at times, and when you take your foot off the gas, it will subtract. This is normal for any vehicle, even my Toyota does this. Once...
No power to ignition,tail lights,no interior lights,and no radio
The vehicle may have a defective front control module that is attached to the front of the main fuel box in the engine compartment. Have the vehicle scanned and tested to see if the module is functioning correctly or is...
Loud tick knock around 1500 to 2500 rpm and a little on startup
Hello, thanks for writing in about your 2006 Dodge Stratus. It can be tough to tell the differences between engine noises sometimes. In general, small parts make smaller noises. Bigger parts make deeper noises. Think drums or cymbals. Lifters make...
The service 4WD/Service Engine Soon Light is on, and my car has front end noise.
Hi and thanks for contacting YourMechanic. This sounds like the front differential has medal particles in the gear assembly, and if so, you will have to remove the differential and have it diagnosed from the inside to see what bearing...
Defroster and heater blows cold air while idling - 2005 Ford Escape
Hi there - the lack of heat (https://www.yourmechanic.com/question/heater-not-working-reliably-is-it-caused-by-a-bad-thermostat-by-thomas-c) from your HVAC system could be a couple of things: bad thermostat, heater control valve, or air in the cooling system. If the engine come up to proper temperature and stays there...
It started shaking then stalled out and wouldn't start back up
This may be related to many different possibilities, some of which may be related to a lack of spark and some of which may be related to a fuel delivery problem or a combination of both. For example, if the...

Related articles

How a Car Ignition System Works
The The complicated process of a vehicle's ignition system requires precise timing on the part of the various systems involved. Starting a vehicle involves much more than just turning a key in the ignition switch; it requires each system to...
How Long Does a Timing Belt Last?
The The timing belt on your vehicle is responsible for coordinating the rotation of the crankshaft and the camshaft so the valves in your engine open and close at the right times, and the vehicle runs smoothly. The timing belt...
How to Rebuild a Car Engine
Whether Whether it is to breathe new life into a commuter or work vehicle, or for hobby in a classic car, there are many cases in which rebuilding an engine can be a great alternative to replacing one. Generally speaking,...