The Milano came with a plastic pouch in the trunk around the spare, like the 105 and 115 cars, It had a lug wrench and a screw driver plus a pliers. The gray empty case above was an option, that had spare bulbs , Fuses , open end wrenches , screw drivers, and a pliers , along with cloth gloves . I purchased a few in the day for my 164 S. I have seen them come up on Ebay
I bought my 1988 Milano Verde new in December 1988 and the tool kit and first aid kit were in the car. The first aid kit was in a compartment behind the rear seats. The tool kit was in the trunk and the jack and lug wrench were under the spare tire. I had an owners manual and maintenance booklet. I purchased a factory service manual from Alfa Romeo and still use the manual.
I have two Milanos and the 1987 Milano Silver did not have a tool kit even if I bought it from the original owner. I bought the tool kit on eBay more than twenty-five years ago. I never used either two kit except for the spark plug wrench.
I bought my 1988 Milano Verde new from a Alfa Romeo dealer and the tool kit was in the trunk. I did not pay extra for the tool kit and it also included a first aid kit which was located in a tray behind the rear seats. I bought two new Alfetta sedans and there were some tools in a plastic box but, the Milano tool kit contained more tools.