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GL Class (X164) 2007-2012: GL320CDI, GL420CDI, GL450, GL550

Gotta be More than meets thee eye

 
Old 01-26-2019, 01:41 AM
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Gotta be More than meets thee eye

I have a 2007 GL450 and the lift gate won稚 go up and down. There is actually no power back there at all! We started removing the parts to take a look and found some very disturbing issues. What can cause this type of damage? I知 worried that if we change the control module & pump that there will be another issue that will fry the new parts too.






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Old 01-26-2019, 01:42 AM
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Any let know the part number for the pump?
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Old 01-26-2019, 10:48 AM
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That looks like there was either a leak into the area where that part was (for quite a while), or it was in a flood. Almost looks like salt water corrosion on some of those parts.
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Old 01-26-2019, 02:43 PM
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Originally Posted by DennisG01 View Post
That looks like there was either a leak into the area where that part was (for quite a while), or it was in a flood. Almost looks like salt water corrosion on some of those parts.
it does look that way. Is there a way to test the pump?
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Old 01-27-2019, 06:58 PM
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Did washer fluid leak onto it?
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Old 01-27-2019, 07:13 PM
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Originally Posted by eric_in_sd View Post
Did washer fluid leak onto it?
i wish I knew...I bought it like that
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Old 01-27-2019, 07:14 PM
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Originally Posted by Mikchek View Post
it does look that way. Is there a way to test the pump?
I can't see a reason why this wouldn't work, but take it with a grain of salt... Those two bigger wires will be the main power feed/ground. Try jumping 12V to them.
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Old 01-27-2019, 07:18 PM
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Originally Posted by DennisG01 View Post
I can't see a reason why this wouldn't work, but take it with a grain of salt... Those two bigger wires will be the main power feed/ground. Try jumping 12V to them.
ok I値l check that..I知 gonna change the control module first as that is completely fried and honestly it痴 the easiest part to obtain. I知 having a hard time finding the pump
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Old 01-27-2019, 07:39 PM
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Originally Posted by Mikchek View Post
I知 having a hard time finding the pump
Try these guys here. I feel for you. I had nightmares on my sons ML 350. Replaced everything and it still didn't work. Had to take it to the dealer.

Top Hydraulics
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Old 01-27-2019, 11:41 PM
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Originally Posted by benzbell View Post
Try these guys here. I feel for you. I had nightmares on my sons ML 350. Replaced everything and it still didn't work. Had to take it to the dealer.

Top Hydraulics
Thanks...I didnt see anything there...I found a few on ebay so far...I will pull the trigger tomorrow after I call this last euro salvage yard...
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Old 01-28-2019, 12:44 AM
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The pump should be part number A1648000748. The module should be part number 1648203185. There is fluid that goes into the pump (in the white/clear portion) the equivalent fluid is Aero Shell Fluid 41 (MIL PRF 5606H), if the part arrives empty. There is a line on the white/clear portion that shows the fill level when standing up vertically. There is a set screw on top of the white/clear fluid reservoir, use a syringe or basting bulb to fill the reservoir to the fill level. Use a product like CRC Electronic Cleaner to clean all of the terminals prior to plugging in the new parts. After parts are installed **Important** to ensure the computer accepts the new parts, plug in the key (remove the push button if Keyless Go and plug in key) and turn to second detent (just prior to starting), then push in the rear hatch button on the drivers door (as if closing the rear door latch) for 5 seconds, to ensure computer recognizes the new pump and control module. Hope it turns out okay. Let us know if you get it working.

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Old 01-28-2019, 08:09 AM
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Originally Posted by Mikchek View Post
i wish I knew...I bought it like that
I'm saying, look around inside the hatch to see if you can find the source. The corrosive fluid came from inside or outside. Inside, it's washer fluid or the hydraulic fluid itself. Outside, it's rainwater or water from being dunked, as in the car went swimming. I'd figure out root cause if I were you.

Stick it out; this seems maddening but you'll get there.
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