Hi what is the correct size for the Mercedes Benz c200 1997 front and rear speakers.

 

there is no "standard" size. Aftermarket wont fit without serious modification. If your speakers are totally shot and you dont want ever to put them back in then some have basically used the existing speakers as a speaker mount by gutting the cone out of it.
but.. see what I did.. 6 1/2 fit in front, 5 1/4 in back


Front speaker mount out of birch plywood



Front DLS Iridium speaker 6 1/2



Polk MM 5 1/4 inch coax rear

 

Does the OP have a w202?

 

thanks for pointing that out.. 1999 would imply that I think with very good certainty since the first w203s where only introduced in 2000...