Search by number: 2003 Mercedes Benz CLK Class 5.5L Alternator ProAmp 11042 $137.00 each OPTIONS: Bosch Unit 150 Amp From 2/2003 ProAmp 13779 $176.00 each OPTIONS: Bosch Unit 150 Amp To 1/2003 ProAmpN 11042N $236.00 each OPTIONS: Bosch Unit 150 Amp From 2/2003 ProAmpN 13779N $240.00 each OPTIONS: Bosch Unit 150 Amp To 1/2003 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