What's wrong with it?
You can bring your 451 and 453s to MB Westminster but they won't touch 450s.
Mainly because they don't have the MB Star Diagnostic for European models.
I asked what's wrong because most good mechanics won't touch them because anything engine related usually means dropping the motor to get to the fix.
I even bought a UK MB Star so someday when I have time I can tackle some things only a MB dealer in Europe can do.
But PM me, depending on the issue (purely mechanical) I have a few trusted mechanics that have worked on my 450s.
They are close to I25 & Evans.