Search by number: 2009 Mercedes Benz CL Class 5.5L Alternator ProAmp 11220 $235.00 each OPTIONS: CL550, Std, 180 Amp ProAmp 11304 $260.00 each OPTIONS: CL600 ProAmp 11310 $281.00 each OPTIONS: CL550, Opt, 220 Amp 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