05 E500 about to hit 50K on miles
 

do I go get everything checked out before 50K by an authorized dealer and have any warranty work done that could be possibly starting to show up??? I bought a 2yr 75K extended warranty b/c I wont own if after 75Kwhichever comes first when the car had 45K on it but was wondering how wise it is to take in while under factory to have everything checked before I hit 50?