Search by number: 2007 Mercedes Benz S CLASS 5.5L Alternator ProAmp 11220 $235.00 each OPTIONS: S550 Standard To 8/31/2006 180 Amp ProAmp 11305 $260.00 each OPTIONS: S550 Option Exc 4MATIC 220 Amp ProAmp 11310 $281.00 each OPTIONS: S550 Option 4MATIC 220 Amp ProAmp 11080 $761.00 each OPTIONS: S600 Why is there more than one unit for my car? Look at the TECH SPECS when more than one unit is shown for your car. AMPS (ELECTRIC CAPACITY): must match you vehicle electric requirements. *** Call us if you are looking to increase your unit capacity! OE ALTERNATOR MANUFACTURER: It is recommended to match the Make of your alternator