The check engine light just came on, and the A/C comporessor stopped working. Are these two related?

I was hoping that maybe a relay or something gave out. I do not have the manual for this car yet, can someone guide me in a direction?

Please help!!

__________________
Regards

Mino Erhan Dallas, TX
'97 SL500 40th A.E.
'97 S320
'01 ML320
'85 Peugeot 505 SW
'07 BMW R1200RT
'74 Suzuki GT750