How JustAnswer Works:
  • Ask an Expert
    Experts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
  • Get a Professional Answer
    Via email, text message, or notification as you wait on our site. Ask follow up questions if you need to.
  • 100% Satisfaction Guarantee
    Rate the answer you receive.
Ask MB Paul Your Own Question
MB Paul
MB Paul, Mercedes Technician
Category: Mercedes
Satisfied Customers: 3567
Experience:  Qualified Mercedes Benz Diagnostic Technician - 20+ years experience - Workshop Foreman for Mercedes
Type Your Mercedes Question Here...
MB Paul is online now
A new question is answered every 9 seconds

I have a 2009 C300 that has developed a whine that you can

Customer Question

Customer: I have a 2009 C300 that has developed a whine that you can hear whenever the engine is running. I thought perhaps it might be a power steering issue or an alternator/generator going out. Car runs fine but the noise is a concern.
JA: Thanks. Can you give me any more details about your issue?
Customer: Just that it is definitely only audible when the engine is running. I turned the wheel left and right and it does not seem to be worse. I'm trying to determine the seriousness of this issue. What else can I tell you that will help?
JA: OK got it. Last thing — JustAnswer charges a fee (generally around $18) to post your type of question to Mercedes Experts (you only pay if satisfied). There are a couple customers ahead of you. Are you willing to wait a bit?
Customer: sure
JA: OK. Now I'm going to take you to a page to place a secure deposit with JustAnswer. Don't worry, this chat is saved. After that, we will finish helping you.
Submitted: 1 year ago.
Category: Mercedes
Expert:  FIXITMAN replied 1 year ago.

Hello, m name is Bobby. Thank you for the question. Can you tell me if the noise changes as the engine warms up. Does it change when turning the steering wheel?