i have used several shops through the years. my current mechanic is gary grubb of european motors at 964 floyd dr in lex. his # 859-233--7222.
he is a excellant tech and fair priced who specializes in mb, bmw and saab.
9 months ago he performed a head gasket repair for me which should tell you
something. kirk gilchrist of eurowerks in winchester phone# 895-745-0125
is another excellant shop.

if you are in the louisville area autobahn motors (502-587-7827) should be the
first place you go to. my sister uses them and told me about them. i later learned after joining the mbca that they are honorary members of the club and give an annual maintenance and repair tips seminar. these guys are real
mb enthusiasts.

as far as dealerships go i would be very wary of going to james motors in lex.
no bad personal experience just what i've heard through the grapevine. tafel
motors in louisville is good as far as dealerships go.