Trans flush $400 ?
I don't take my MB there because I do my own maintenance but they do have the trans flush and oil flush and it doesn't cost $400. I think it costs like $200 for trans flush. $100 for oil flush.
2. Jiffy lube? I've read about the machine/process that connects in line with the trans cooler hose but you need to drop the MB trans pan anyway to replace the filter so why do the in line?
3. If you do change it....make sure you use the correct fluid.
The transmissions use synthetic ATF, it's about $9-$11 / quart.
MB says "lifetime" fluid but the fluid that came out of the ML was pretty much black and shavings...good to do for piece of mind and longevity of the transmission. Some agree and some don't
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Synthetic fluids do last a long time but it surely doesn't last forever. I'd definitely change it by 50,000 miles if not sooner. If you're past 25K and haven't ever checked it I suggest doing that and seeing how it looks. If it's burnt looking swap it out.



The manual for my car suggests that changing the fluid is not required until 143,000 miles, along with the engine coolant. Seems long to me, but so is German opera.
The only part of the drive line I see that needs service earlier is the guibo, which they say to inspect every 52,000 miles.
MB says "lifetime" fluid but the fluid that came out of the ML was pretty much black and shavings...good to do for piece of mind and longevity of the transmission. Some agree and some don't

These days the gimmick is to sell the customer on "maintenence free for as long as possible". General motors has 150k mile coolant, or 5 years. I have seen several cases where the coolant gells and ruins the radiator befor 100K.
My father in law is a tech for cadillac and says the coolant also turns acidic, eating intake gaskets, and head gaskets. I expect the bet is that the vehicle will change owners once or twice by the time its first service is "due".
..On a good note, the mb tech stated that the trans is very strong as long as it's service, the radiator doesnt leak coolant into the trans cooler portion, and the glitchy electronics have been replaced, not just reprogrammed.(trans control module)
So long as his professional opinion is based on what he actually sees on a mechanical level, what he says has merit.
Clogged radiators, and sludge for coolant prooves that the engineers, or someone, missed the boat on 150k mile coolant. The engineer is'nt fixing the car, the mechanics are.
I appreciate your input, and also you others.




..I see your reasoning, and I agree that somtimes maintenence can be carried too far, but in some cases, the guideline is not enough. And thats what I am concerned about. A technician tells me that lack of maintenence on a specific component is causing problems and later could lead to malfuntion or failure, it's fair to make some adjustments. And in some cases, a must. Like dex-cool coolant for example, or oil changes on chrysler 300m's, or northstar sparkplugs before 100k to prevent electrolisis and welding to the cylinder head. And if engineers were 100%, thered be no such thing as a recall.
How something behaves in the real world is often times different, sometimes vastly, than it did in the testing enviroment.




