SOURCE: 2000 mercedes benz retractable hard top will not retract
underneath the trunk liner by the spare is usually where the pump and relay are located. The reservoirs are generally in the r side of trunk. These vehicles are very compact and they have a space saver spare that has an air pump to inflate tire. Remove those items and look in owners manual for reservoir and fluid specs.. Try starting your car and raising the top all the way on. You also may have not retracted your cargo cover in trunk or the microswitch on the side has fallen off giving faulty input to the module. Even though the pump is running the fluid isn't being dispursed to the proper r.a.m.s for 1 of 2 reasons. either you have a bad or loose microswitch. Or a cable is broken or loose not closing or opening up a microwitch and the module is in "limp home mode" it is the default of the system designed so no one or no thing gets hurt. If none of these things help you the top can be raised or lowered manually. your owner's manual tells you how to do this. Then you will need to get the car scanned for codes to properly diagnose the problem. Good luck
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