90 Day Warranty The 90 day Warranty covers the repair of your unit back to its original operating condition for any problems resulting from manufacturing or workmanship defects. All internal components and labor performed by Passive Devices are fully covered. It is valid as long as you own the vehicle and is non-transferable. Shipping, removal, diagnostic, coding, programming, software download, and/or mechanic charges are not covered by the warranty. If Passive Devices determines the part is beyond repair, we will either provide a replacement unit, or refund the entire purchase price, at our discretion. Factors that could void the warranty include, but are not limited to: water damage, fire damage, over voltage damage, part being damaged as a result of another defective part in the vehicle, damage caused by jump starting the vehicle, improper use, use in an application for which the part was not intended, or untimely return of core unit (if applicable).Not all parts can be fixed. If your part is not repairable, we will refund your payment and ship it back to you. If you send in an item that does not match the one in the description, we will again refund your payment and ship it back to you. Mercedes Benz/Rolls Royce Antenna REPAIR/REFRESH SERVICE 90 DAY WARRANTYThis is a SERVICE to repair a part YOU ship to us.Common Symptoms of a Faulty Unit: These units commonly fail by gears, belts breaking and antenna failures. We have spare parts and rarely are unable to fix the unit if it is primarily intact. We dont just repair we also professional clean and lube your device so that it will last for years to come. You can send us pics prior and we can analyze it before you ship it. Please note: We cannot repair physical damage to the outer shell or broken tabs in the casing. If the MAST is damaged then you will need to purchase a new one from my store for an additional $40.00. or $150. for a genuine Hirschmann (based on availability) . I do not accept shipments with a separate MAST.If your control unit is damaged meaning your motor does not start please contact us BEFORE ordering. How does the a "Repair/Refresh Service" work? Please send us 3 pics of your device, front, top and back along with a brief description of the problem. This is to make sure your antenna is one that we can repair and should it be lost in the mail its the proof we need to file a claim. After we receive your payment information, we will email you a shipping label to your email address. We only ship within the USA. You print that label and package up your part then ship it to us. We are closed on weekends, but otherwise the shipping label will be emailed to you within 24 hours. How long will it take? Repairs take 1-2 business days once we get the part here and then add shipping time back and forth to your location. Two way shipping costs are already included in the shipping feeHow do I package the unit? As these units contain delicate electronics and can be damaged in shipping, we recommend that you use a large box (so that there are about 3 inches of extra space on each side), wrap the unit in a layer of bubble wrap and fill in the extra spaces with packing peanuts.