722.9 service and cooler
Thread Starter
Newbie
Joined: Mar 2012
Posts: 2
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2009 ML350
722.9 service and cooler
Hello, all new to the the MB world, so far so good. Picked up a 2009 ML350 with 28k on it.
Just did an almost complete service, oil change, plugs, air and cabin filters, belt, rotate tires, just wanted to start off fresh.
One question on the transmission. I want to add a cooler, I have always added one to my other cars with great luck, but this one is different. I understand no dipstick, fill when its up to temp, but if I add the cooler, how will that affect the fill level at temp? Fluid expands with heat, but the cooler will help that, but the car will not be moving. Am I making sense, someone add to this, Thanks
Just did an almost complete service, oil change, plugs, air and cabin filters, belt, rotate tires, just wanted to start off fresh.
One question on the transmission. I want to add a cooler, I have always added one to my other cars with great luck, but this one is different. I understand no dipstick, fill when its up to temp, but if I add the cooler, how will that affect the fill level at temp? Fluid expands with heat, but the cooler will help that, but the car will not be moving. Am I making sense, someone add to this, Thanks
MBWorld Fanatic!
Joined: Sep 2011
Posts: 1,522
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From: East Texas
2004 Volvo XC70; 2012 GLK 350 4matic
Welcome aboard.
I understand your desire for an aftermarket cooler. A couple questions come to mind:
1. How much capacity does the OEM cooler have? It may be sufficient.
2. Will the software for the transmission tolerate tinkering with the cooling circuit?
3. Hopefully someone has done this and will give you the straight scoop.
Wayne
I understand your desire for an aftermarket cooler. A couple questions come to mind:
1. How much capacity does the OEM cooler have? It may be sufficient.
2. Will the software for the transmission tolerate tinkering with the cooling circuit?
3. Hopefully someone has done this and will give you the straight scoop.
Wayne
Member
Joined: Sep 2011
Posts: 131
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From: Lake Tahoe
w164 (ml 500)
Mark.
MBWorld Fanatic!
Joined: Nov 2001
Posts: 4,260
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From: Philadelphia area
2010 ML550, 2010 E350 4M, 1966 Corvette Convt C2
No additional cooler required or needed. In fact it may foul up some functions. Have heard of no transmissions overheating even towing heavy trailers. My suggestion leave it alone
Senior Member
Joined: Jan 2012
Posts: 313
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From: SoCal
'03 A4 2.0 Stroker, '14 E63 S AMG, '10 E550, '10 S550, '03 C240
Correct, transmission fluid needs to get up to proper working temps to work properly. A trans cooler would make heating up the fluid much tougher on the trans.
Super Member
Joined: Dec 2007
Posts: 898
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From: Woodstock, IL
His 2019 RAM Cummins Turbo Diesel Laramie; Her's 2007 ML320 CDI P3; Mine BMW R1200R
Belac350, as said before, LEAVE IT ALONE.
These transmissions are very technical, and requires a computer to properly refill the tranny. You will notice no dipstick, and it also takes a special fluid.
With 28K miles and a new purchase, I would take it to a dealer and have the tranny fluid and filter replaced. This is recommended at 39K miles, but as you don't know the history and want to start fresh, jump the gun here. While it's there, have them update the tranny software.
Then drive
, and make sure you have an extended warranty.
$7500 for a tranny job, IF you can find a rebuilt one.
Otherwise, enjoy the ride.
These transmissions are very technical, and requires a computer to properly refill the tranny. You will notice no dipstick, and it also takes a special fluid.
With 28K miles and a new purchase, I would take it to a dealer and have the tranny fluid and filter replaced. This is recommended at 39K miles, but as you don't know the history and want to start fresh, jump the gun here. While it's there, have them update the tranny software.
Then drive
, and make sure you have an extended warranty. $7500 for a tranny job, IF you can find a rebuilt one.
Otherwise, enjoy the ride.
