Hello all. Last sunday I discovered a lot of oil in my coolant expansion tank mixed with the coolant fluid.
In the afternoon, the car left a lot of oil + coolant in the floor. When I opened the oil filler cap, I noticed a little bit of steam, and the expelled oil was obviously mixed with water, so I decided to tow it to a garage. The next morning, we found that the oil level had dropped about 1 liter from the day before.
Do you, guys, think that there is another possible cause for this appart from the obvious one (head gasket / cracked head or block) like a water pump seal or something?

Thanks!

1992 190E 2.3 (8 valve)