W220 S430 S500 Mercedes Benz OEM Bose and similar items

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Returns available for DEFECTIVE issues only WITH DOCUMENTED PROOF FROM REPUTABLE INSTALLER. Trial and Error diagnostics by Do-it-Yourselfers is the #1 reason for returns. Due to the attractive pricing of buying ‘used’ versus a ‘new’ part there is a given amount of risk of a successful repair. You MUST accept this and take the necessary time and research to further guarantee successful results !! -—- Defective items will be replaced if a replacement is available. Any returned items receive refund with original shipping cost removed unless item is determined indeed to be of faulty or defective nature qualifies for full refund. Item tags and etchings must be in place and not modified or removed. Circuit boards are marked to prevent swapping of internals on electronics. Thank You for your co-operation !!