I'm from Baton Rouge Louisiana I own a 2000 Mercedes SLK the performance and handling is great I love the car I've taken it on trips I've gone to Arizona and Florida and it was fine but then it started having a heating issue and I checked the the oil seems to have a little water in it so maybe the radiators leaking I was recommended that it should swap the engine after 130k miles I have an inline 4 engine and I would like to maybe upgrade to like an M11 or something like that I'm wondering is this a good idea or should I just sell the car all right