I ate lunch at the Mendoza Argentine Steakhouse in Berlin on Buschkrugallee yesterday. I think it is in Neukoelln. I was on my way to a bookstore in Kreuzberg that has books in English. This restaurant is fairly small and on the ground floor of an old house converted to a restaurant and some other businesses. It s attractively decorated with very subdued color scheme. Handicapped access is fairly good for Berlin. There are only 2 steps up into the restaurant.
I ordered an empanada for an appetizer. It was large and filled with ground beef, some corn and some onions in a tomato-based sauce and served with a small salad (lettuce and tomato) and sour cream. The dough was particularly crispy, but the corn was a little hard. It would have been better without the corn and with less onions (I don't eat onions). Empanadas are better with chimichurri sauce than with sour cream. It was good, but I can make better at home if I can get the dough rounds.
I had a 200 gr entrecote with a corn ear for the main course. The steak was excellent although I had to send it back for more cooking. When it was served, it was what I call "the Klein Max Special". Klein Max is my big red housecat that I call a German farm tiger because he plays rough and he's temperamental; he prefers the raw kind, but will take anything he can steal. I had to ask for chimichurri sauce and when it was served, it had far too much onions in it and is not the kind with parsley, garlic, red pepper, olive oil and vinegar that I prefer. I had the waiter bring me Tabasco sauce and put that with the oil from the chimichurri sauce over my steak. Again, the corn ear was overcooked and the corn was hard, but the herbed butter was very good. I had some very good coffee with my meal and no dessert. The bill was around 18 Euros. The service was excellent.
Overall, it is a nice restaurant with reasonably good food at average prices for Berlin, but I didn't like it well enough to go back.