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ok I have a 2007 GL450 and when I bought it the tailgate didn't work. It wasn't a big deal cause the dealership said its probably just the latch and they would fix it for me. Unfortunately I didn't get that in writing so I'm stuck hoping that someone can give me some type of insight as to what is going on.
Got it to the dealer and they opened it up and realized its not the latch. Found that the Hydraulic pump and the control box are bad...
Once I replaced those the SDS is speaking to them and they seem to be working but the lift gate still doesn't work. The SDS is saying that it can't communicate with the sensors.
So I go change the sensors and I'm still not getting any action to the door. Won't go up or down. Does anybody have any idea what is going on?
Also, you can try testing the pumps individually for proper operation (maybe the old ones; find the pinout and provide a 12v input); or test the connectors and lines for continuity with a multi-meter.
Last edited by Miguk_Saram; Feb 19, 2019 at 06:58 PM.
Also, you can try testing the pumps individually for proper operation (maybe the old ones; find the pinout and provide a 12v input); or test the connectors and lines for continuity with a multi-meter.
Thank you for this insight....I'm going to go over it tonight and see if we can figure out what is going on tomorrow.
That SAM unit looks baked! When there is corrosion on those part it usually means you have a leak at one of the tailights which allows the water to pool at the spare tire area. Did you replace the control unit? Pump may be good...
check connectors under the front seats. unplug a few and look inside. if they are corroded (or you see any indication of corrosion or sediment talk to dealer to repatriate the car back to them.
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