Engine has rattle at start up. (sounds like the valves are "clacking" or the sound a diesel engine makes).

Brought it (while still under warranty) to Brossard MB dealer (on three occasions) to complain. They changed the pulley tensioner but did nothing, They then changed the engine cover bushings but had no effect. They then told me that this issue was "normal" for all B200T's!!! Ridiculous! The warranty has now expired and the engine rattle is worse than ever. Complained to MB but no one ever responded. The rattle doesn't seem to effect anything and goes away after it warms up. No idea what it is.