Good afternoon!!

Good afternoon!!
I had my Mercedes Benz serviced at Mercedes-Benz of Bellevue on 8-15, and after the vehicle sat in the garage overnight, I noticed some fluid on the ground. I had it inspected, and it turned out to be only windshield washer fluid possibly from the frame of the vehicle, but, upon further inspection of the engine compartment under the hood, I noticed there was a grey rag sitting on top, which is a very dangerous fire hazard. There was also a lot of residual motor oil on top of the plastic cover as well as some below on the frame of the vehicle. This should have been cleaned up during the oil change service.
I've can provide photos of all of this upon request.