Coolant in trans fluid???? Help! - Page 2 - Mercedes-Benz Forum

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post #11 of 42 (permalink) Old 04-02-2008, 08:00 AM
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I personally...

would think twice on the Mobil 1 synthetic route. Your transmission requires a specific ATF, with a specific base and additive pack, which the MB ATF provides. If you check, I think you will find that the Mobil 1 ATF is not factory approved for your unit. Using this will be at your own risk...

JR
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post #12 of 42 (permalink) Old 04-02-2008, 03:07 PM
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would think twice on the Mobil 1 synthetic route. Your transmission requires a specific ATF, with a specific base and additive pack, which the MB ATF provides. If you check, I think you will find that the Mobil 1 ATF is not factory approved for your unit. Using this will be at your own risk...

JR
Remember the transmission is sealed for life.
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post #13 of 42 (permalink) Old 04-02-2008, 03:20 PM
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There is much debate on that one...

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Originally Posted by mlfun View Post
Remember the transmission is sealed for life.
Even the dealer network is backing away from that position, for the most part.

50-60K seems to be the recommended change interval, utilizing OE fluid.

JR
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post #14 of 42 (permalink) Old 04-02-2008, 06:55 PM
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Even the dealer network is backing away from that position, for the most part.

50-60K seems to be the recommended change interval, utilizing OE fluid.

JR
Really ? Can you post a link or scan ?
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post #15 of 42 (permalink) Old 04-02-2008, 07:03 PM
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Originally Posted by E-Class Owner View Post
Even the dealer network is backing away from that position, for the most part.

50-60K seems to be the recommended change interval, utilizing OE fluid.

JR
My local dealer is not backing away from MB's position on OE fluid, (and I'm dealing directly with a very well-informed senior member of the service staff).

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post #16 of 42 (permalink) Old 04-02-2008, 07:11 PM
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Oil in the trans fluid could also indicate a leaking main seal between the engine and trans.

As for the "lifetime" trans fluid in the post 93 cars . . . the lifetime that is meant is the lifetime of the trans, not the owner(s). Without servicing the fluid, the internals of the trans will eventually clog, overheat and scortch the bands. Those transmissions take about 8 liters of fluid and only MB fluid should be used.
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post #17 of 42 (permalink) Old 04-02-2008, 07:38 PM Thread Starter
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So if I flushed the trans with Mobile 1 (about 6 liters) and then flushed and filled with MB trans fluid (about 8-9 liters) I could still have problems with a small amount of Mobile 1 still left in the trans?
Should I flush more MB trans fluid through the trans?
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post #18 of 42 (permalink) Old 04-02-2008, 11:27 PM
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MB USA is never going to back...

away from their "official position" on the "lifetime" ATF, as to do so would invite a plethora of law suits. The attorneys at the corporate HQ in NJ would never go for that...

No offense intended, but it sounds like your dealer likes to sell replacement transmissions... Does your "very well-informed senior member of the service staff" work on commission, or get incentive pay based upon the repair work sold to the customer?

I will tell you this much, very senior member of the service staff at my local dealer told me that my M119 engine took two spark plugs per cylinder I checked my completed invoice VERY carefully to make sure only 8 were actually charged out... sheesh.

JR


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My local dealer is not backing away from MB's position on OE fluid, (and I'm dealing directly with a very well-informed senior member of the service staff).
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post #19 of 42 (permalink) Old 04-03-2008, 12:27 AM
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So if I flushed the trans with Mobile 1 (about 6 liters) and then flushed and filled with MB trans fluid (about 8-9 liters) I could still have problems with a small amount of Mobile 1 still left in the trans?
Should I flush more MB trans fluid through the trans?
I wouldn't sweat it. Mobil 1 is fine for the transmission.

Yeah, I know MB claims their transmission fluid is special but then
MB also claims it doesn't need replacement
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post #20 of 42 (permalink) Old 04-03-2008, 02:48 AM
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Originally Posted by MTI View Post
Oil in the trans fluid could also indicate a leaking main seal between the engine and trans.

As for the "lifetime" trans fluid in the post 93 cars . . . the lifetime that is meant is the lifetime of the trans, not the owner(s). Without servicing the fluid, the internals of the trans will eventually clog, overheat and scortch the bands. Those transmissions take about 8 liters of fluid and only MB fluid should be used.
a rear main seal thats leaking will not make its way into the transmission. the front pump seal and the rear main seal sit eye to eye, but you have the flex plate and torque converter in between. oil will not run down and into the tranny and up into the tranny. the laws of gravity take a toll here. oil will leak out through the bell housing.
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