If your Mercedes is cranking slowly when starting and thelights are dim even when you're revving your engine, it may be timeto replace the alternator. We offer Bosch and other O.E. factoryrebuilt units. Alternators are rebuilt to meet rigid factoryspecifications. When ordering a rebuilt unit, the applicable(depending on application) core charge is added to your orderautomatically. This core charge will be refunded in full when wereceive your core in a good rebuildable condition. Return freighton the core is the customer's responsibility. (For refund we mustreceive your core within 30 days)