installing ac/compressor in 1994 s420
 

hello,,, can any one give me a little advice and tip,s on installing a comperssor and rec/dyer/ and epansion vale,, to the ac/ sysm,, my comperssor stop working an iwas told that it,s is the compressor,, is this a job that can be done by agood mech,,, any tip and advice would be helpful,,,,, thank,s mel dwyer 94/s/420