Squealing '89 300E

[AdMaven]

I've noticed a squeal coming from under the hood just the past week or so and now it's getting louder. I had the AC compressor and dryer replaced just before this started--so tonight I turned off the AC/Heating and the squeal stopped.

Is this a separate belt or is there only one belt drive for the engine? I don't want to get stranded before I take it back to my indy. TIA.

BTW--I want to compliment Phil for the great customer service here! I was having a problem during my checkout a couple of weeks ago online and my phone rang. It was Phil telling me he was fixing my order. Imagine that!! Thanks so much!