Major w203 M271 meltdown.
im sick and tired of searching and reading everywhere and still end up in the same place.
few weeks back my cars temp was tripping. there was a thread about this. after while at this problem i noticed a new one come up. something is leaking.
at first i though it was the coolant coz of my temp prob, also it the leak shines greenish on light. but i traced it and it went down to the tranny pan. so i took out the splash guards, put on some gloves and got all the oil in my hand. it was goldish..
ok. so i thought now it was engine oil. while the whole car was jacked up i started to drain my engine oil(i was due anyway for a service). i drained the car overnight. then put everything back together EXCEPT i dint put any engine oil. i left the car jacked up for another night to observe where this leak is coming from(i wiped down the wet spots under first of coarse).
next day(TODAY). it was all wet again. looked around and it look to be coming from the adapter on the tranny. from what ive searched this is a common problem. needs 2 o-rings to fix.
by the way i had my tranny serviced at approx 70,000 and now im at 87,000 and also my coolant.
well my shopping cart is ready for check out and i want to be 101% sure of what im doing:
Lock Pin For transmission filler cap. (im OCD. i want that pin.)
Adapter Plug With O-Rings Transmission Cable to Conductor Plate
MB tranny Dipstick (anyone wanna lend me theirs??? save me the $40)
Drain Plug Seal Ring
A/T Filter & Gasket
Engine Temp Sensor
BEHR Radiator
Radiator Fan
Tranny oil (not sure exactly how many i need)
Coolant
Front and Rear Rotors & pads
waiting for my kit to arrive from blackstone labs to test my oil.(this ones gonna be a long wait)
so as you can see its a pretty fat order. so help me and my pocket out. i dont wanna replace anything that doesnt need replacing. NO ERROR CODES by the way.
SO ANYWAY............................
heres where im stuck:
oil is goldish... if its from the tranny it should be red. if not orange.
is it gold because of contamination? (i read its a common problem with valeo radiator's)
as of now my car is on stilts. i dont want to take the risk of loosing the whole tranny or engine.
Last edited by skittles; Jan 7, 2010 at 11:58 PM.
this might be the solution to my first problem which was the go stop go stop low temp high temp.
Last edited by skittles; Jan 8, 2010 at 12:08 AM.
6-8 hr job because you need to remove the transmission to do it. And the funny thing is the gaskets only cost 50-80 bucks from the dealer, labor will kill you
Both dealer mechanics doesnt recommend to replace the rear main gaskets as of the moment because the leak is still small.
BTW car has 51,000 miles
can i inspect this leak/gasket location you are talking about without removing the tranny? also if you dont mind do you have a part number if not whats the exact description on the part. thanks.
edit: you said rear engine main seal gaskets, is that the rear crankshaft seal? im gonna replace it even if the dealer says no.
Last edited by skittles; Jan 8, 2010 at 01:36 AM.
you can see the color and where i think its coming from.
heres the album for the rest of it. http://s646.photobucket.com/albums/u...%20oil%20leak/


I would change out the tranny brushing and change the transmission fluid and see if it still leaks.
The auto needs about 4qts to change the transmission fluid, depending on how much you pump out. Just put back exactly what you took out. Don't put in too much fluid.
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the factory fill for the 722.6 was red fluid.
A001 989 68 03 10 which is the 7 speed transmission fluid, is red. perhaps this is only for the u.s of a

Red Benz fluid in most markets would be a sure way to ensure misapplication & the wrong product in your box.


This is not my car
My engine & transmission are spotless.I did notice from C230 Sport Coup's tranny thread that the Fuchs Titan 4134 Fluid was pink.
I will bear in mind that US tranny fluid is a different colour.
TEMJINX2, yeah i saw that TSB. what preblem exactly am i looking for with this thing. the car jerks? limp mode? i dont really get it.




Red was what went in.
Something about the mechanics getting confused, and red is the generally accepted
color for tranny fluid in the US.
Some may have noticed the cars came with blue coolant, only to be replaced with yellow as well.
Silly Americans.
I fart in their general direction.
TEMJINX2, yeah i saw that TSB. what preblem exactly am i looking for with this thing. the car jerks? limp mode? i dont really get it.
Others have had weird shifts or lags between shifts.
Anyways its a 5min fix, you don't even have to drop the pan if you dont want to. You can just take off the shield and swap out the brushing. Your also going to need electrical contact cleaner, so clean out the connector.

Red was what went in.
Something about the mechanics getting confused, and red is the generally accepted
color for tranny fluid in the US.
Some may have noticed the cars came with blue coolant, only to be replaced with yellow as well.
Silly Americans.
I fart in their general direction.

Coolant meeting:
325.0 = orange/straw colour
325.2 = Green
325.3 = Blue/green in colour
For 143,000 miles or 15 year drain interval you are now supposed to be using 325.3 plus the silica gel sachet (mesh bag) to release silicates.
I understand that most American dealers do not stock the 325.3 coolant so people are getting their cars with the latest generation initial fill from Germany & South Africa & then poluting it with the older generation coolant - they are miscible - Or in the case of a pump failure or whatever, loosing & tossing the new long life coolant & replacing it with the old stuff. Not clever.
So I haved filed away in my brain for future reference on this forum that the Americans are dyeing the tranny fluid the wrong colour & selling old generation coolant to the masses. I will bear this in mind when scanning the location of the member.
Indeed a fart in their general direction

Others have had weird shifts or lags between shifts.
Anyways its a 5min fix, you don't even have to drop the pan if you dont want to. You can just take off the shield and swap out the brushing. Your also going to need electrical contact cleaner, so clean out the connector.
just want to make sure. this brush is the adaptor on picture 3 right? the one with the common o-ring problem.
edit: btw i dont get any weird tranny behavior at all. just in the morning when i try to run the car w/o heating it up, the tranny clunks.
Last edited by skittles; Jan 9, 2010 at 06:54 AM.
Here's some better pics here.
http://www.installuniversity.com/mb/...on-o-ring.html
it came soaked in tranny oil? hahaha. oh and i notice that screw on the bottom. the new one doesnt have it. do you have to move it to the new one?
Last edited by skittles; Jan 9, 2010 at 03:46 PM.
it came soaked in tranny oil? hahaha. oh and i notice that screw on the bottom. the new one doesnt have it. do you have to move it to the new one?





