92'-93' have the problematic 7 channel amplifier (old style) that goes bad quite commonly...along with the head unit, tuner box, and cd changer...all of which are bad on my car. Costs a pretty penny to fix, whether you go aftermarket or repair the stock equipment.

__________________
Current cars:
2000 ML55 AMG, 174k miles
2003 C240 T-Modell, 202k miles
1995 S320, 207k Miles