'09 GL450 transmission fluid (ATF) change - Mercedes-Benz Forum
 
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#1 (permalink) Old 10-15-2010, 11:00 PM
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'09 GL450 transmission fluid (ATF) change

Does anyone know where the refill point is for the transmission fluid? I know where the drain plug is located but where do you pour in the fluid? Thanks.

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#2 (permalink) Old 10-15-2010, 11:09 PM
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Through the drain plug. Not for a backyard mechanic to do. You shouldn't have to mess with it. That's what dealers and warranties are for.
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#3 (permalink) Old 10-16-2010, 12:00 PM
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That's what I thought. Thanks.
I was just curious since this thing doesn't have a refill point. It doesn't call for a fluid change until 40k miles.
BTW, I am a backyard mechanic and I'm sure I can handle this :-) I know that these luxury brand makers like to intimidate people into brining their cars into their service department. It's just all nuts and bolts in the end.
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#4 (permalink) Old 10-16-2010, 01:30 PM
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Well good luck. Correcting or filling the trans oil level in your trans is not like the old school stuff. Where you check it at operating temp, with engine running. You've got to have the trans at a SPECIFIC temp and let the oil drain until that temp is reached at idle then plug it. The temp depends on the type of oil pan and tower color in the pan. Then you need to know the exact temp of the oil. It might save cash if you do it yourself now but if it's not correct those transmissions aren't cheap. If it gets to difficult in your garage STOP. it's worth a tow bill and $300 at the dealer for a trans serv. Not $5000 for a new trans. Just looking out for you.
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#5 (permalink) Old 10-16-2010, 02:23 PM
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I gotcha! I only have 14k miles on mine and it's not due for a ATF change until it hits 40k miles. I'll probably dump my GL before then anyways.
I enjoy "tootling" around my cars, that's all.
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#6 (permalink) Old 10-17-2010, 10:24 AM
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Quote:
Originally Posted by luv2sleep View Post
That's what I thought. Thanks.
I was just curious since this thing doesn't have a refill point. It doesn't call for a fluid change until 40k miles.
BTW, I am a backyard mechanic and I'm sure I can handle this :-) I know that these luxury brand makers like to intimidate people into brining their cars into their service department. It's just all nuts and bolts in the end.
You might want to read the WIS procedure first. It takes the dealership computer to verify the correct amount, and, yes, a special tool to install the fluid. You're massively overconfident. Know the number of the flatbed wrecker before you start.

Kent Christensen
Albuquerque
'07 GL320CDI
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#7 (permalink) Old 10-17-2010, 10:54 AM
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Originally Posted by lkchris View Post
You might want to read the WIS procedure first. It takes the dealership computer to verify the correct amount, and, yes, a special tool to install the fluid. You're massively overconfident. Know the number of the flatbed wrecker before you start.
I am aware of the procedure and the temperature requirement. There's a good write up about this procedure on MBWorld.org Mercedes Benz Enthusiast Community. Overconfident... no. Confident.... yes. The last 4 MBs I've owned in general have been very DIY friendly. Even this trans fluid change isn't that bad. Thanks for caring, though. Your sarcasm kind keeps this forum entertaining too.
The reason why I asked this question in the first place was mainly because of my curiosity. I like looking over the mechanics and engineering aspects of different cars. I grew up around lots of cars, working on them occassionally; my dad was a car buff.
None of this really matters since I don't keep my MBs past the warranty period. We love this GL450 but it's already been in the shop 4 times for warranty work. I'll be ready to dump this thing in about 2 more years and look for something more reliable.
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