2005-2011 Mercedes-Benz W164 ML-Class | ML280, ML300, ML320, ML350, ML420, ML450, ML550
Top Hydraulics is proud to offer core exchange for ML lift gate pumps. Core exchange means we send you a pump from our inventory first, then you send back your original one (known as the core) to recover the full deposit if the pump can be rebuilt (which they almost always can) and you sent us back all parts.The pump ships filled with fluid and with new crush washers for the hydraulic lines, which makes pump replacement plug-and-play for you!
Most pumps fail when they accidentally get exposed to too much moisture. The rebuild service of the electrical portion of your pump can entail replacing the electric motor, replacing the solenoid, rebuilding the motor, rebuilding the solenoid, replacing the wiring harness, repairing the wiring harness, or a combination of the above. In most cases, the electric motor gets fully disassembled, the housing gets sandblasted, and protected with several paint layers. Further to electrical issues, Top Hydraulics will always rebuild the pump by replacing internal seals, replacing rotor and pistons if necessary, replacing or rebuilding internal check valves, and putting the finished product through an extensive test to ensure that you get back a pump that performs better than a brand new one.
A simple description about any competitors that we have seen so far, trying to "invade" the pump rebuild market: there is no comparison to our product. We do the job right, and we ship products of which we are convinced that they are better than brand new ones. We don't supply make-shift solutions that may make the pump survive a short warranty period, but we implement solid improvements to the pumps. For example, we mold our own oil seals (between the electric motor and the pump - much like the rear main seal of an engine) in an improved shape (compared to OEM seals) that will allow more back pressure from the pump and last longer. Unless our rebuilt pumps get badly abused, they should outlast your car!
Pump and cylinder part numbers applicable to the ML-Class and GL-Class hydraulic rear door closing system: A 164 800 02 48 Hydraulic pump with cylinder for rear-end door closing liftgate, aka p/n 1648000248 A 164 800 06 48 Hydraulic pump with cylinder for rear-end door closing liftgate, aka p/n 1648000648 A 164 800 30 48 Hydraulic pump with cylinder for rear-end door closing liftgate, aka p/n 1648003048 A 164 800 32 48 Hydraulic pump with cylinder for rear-end door closing liftgate, aka p/n 1648003248 A 164 800 18 48 Hydraulic pump motor/pump element, aka p/n 1648001848 A 164 800 48 48 Hydraulic pump motor/pump element, aka p/n 1648004848