Since I'm Swedish, speaking with the stockholm dialect, I have no problems rolling the Rs.
I did however have huge problems using the two Rs in Spanish, which always made people laugh whenever I pronounced something wrong (pero vs perro, imagine how it would sound like if I'd say "dog that is so difficult to say").
As a Swedish teacher, teaching Germans, it has been both easy and hard. Teaching a northern German Swedish is almost impossible, because their "french Rs" always stay with them (it is used in southern Sweden but that's not the pronunciation I'm teaching them). Funny enough, Bavarians are the students that have an easiest time to pronounce the swedish language in all cases.
L? huh