How much more power can the stock system take?
 

Hey all, Just bought a 1992 mercedes 190e. I would like to add a new sound system to the car, as well as other accessories in the future such as heated seats, etc
What would be the maximum current I can draw from the alternator for these various upgrades without taxing the alternator too much. I really don't want to replace the alternator.
Thanks for any help.