Good Morning All! I'm a new member to this site although I've researched repair topics a few times prior to registering.
Everyone is great and offers so much valuable information. I'm in need of some help now.
My 2001 ML430 started making a knocking noise in the dash yesterday when I left work. It knocks constantly. The a/c and heat work. The knocking will start when the key is in the 'on' position before even starting the engine.
My car is going to the dealership for inspection/emissions in a few days but I really can't afford for them to fix this (if its what I've been reading on the blogs). Some people paid $600 or more but the part needed is less than $20.
So, my question is: Do you know what this is? And, can you tell me which part I may need?
Thank you so much and I look forward to hearing from all!