over tightening will not damage the pan or gasket. it will only strip the threaded hole in the aluminum case.
connector guide bushing leak is usually seen at the right front corner of the pan, not the left rear.
the shifter shaft goes through the case near the left rear. can you post pics of the leaky area?

 

Maybe you had a sloppy tech. Clean the pan and drive it around a bit. See if it comes back. Just another idea besides funkys...

 

They can be overtightened and, if the guage of the pan's metal is thin enough, it can distort the flange. This would cause uneven clamping along the sealing surface. Find out what the torque spec is and you could retighten possibly.

 

the clamps used to retain the oil pan prevent excessive clamping force on the pan and gasket. over torqued bolt will only pull threads out of the case and will not damage the gasket or distort the pan.

 

I had leakage issues after service at the dealer as well. My problem was the fluid level. The transmission temperature needs to be measured when determining the fill level, and my tech did not do that. Moreover, the transmission temperature needs to be measured when out of park. I finally got it fixed, when I brought the service manual page to them and asked to recheck the level using those instructions.

I understand your leak may be in a different spot, but I wanted to throw that our there if you need other possibilities.

 

Great feedback guys!

Just pulled the car foward this morning to see the carnage and more fluid leaked out overnight. It looks like it is coming from the passenger front of the pan if I gauge where the spots are in relation to my front wheels when parked. I am going over to my friends to put it up on ramps to have another looks. The dripping on the rear could be the airflow forcing the fluid back along the pan while driving. The drivers side front had a couple drips but that could just be the fluid travelling along the front of the tranny to the side. Seems to make sense.

It is strange seeing I had this TSB done in 2007 and it might be the fluid leaking again in the same place. It seems that overnight the fluid level slowly increases as the transmission drains back to the pan and brings the level back up to above the connector if I was to make an educated guess. It take a while before the leak starts while parked and the engine cools down over time.

It might be overfilled as well, but I am thinking it wouldn't leak out, but cause some shifting performance issues which there has been none. Also, it leaks less when driving which could be b/c of the level dropping when the tranny pulls the level down in the pan during startup.

I also see that the exhaust pipe immediately behind the tranny on the passenger side is wet with some sort of fluid. Could be splashing back while driving. I don't think it is water seeing that would evaporate quickly.

Looks like the cheapest thing to do is get a whole new connector either from Mercedes of the Chrysler Dealership. I am not going to mess with o-rings seeing I will have the part out anyways and might as well just put in a new part.

Does anyone have the part numbers for the whole connector from either MB or Chrsler for reference. I will call around and see if the price is the same. I can swap the new part in very quickly.

Keep the feedback coming! Anyone else that had the o-rings done on the connector and had the leak come back a couple years later? I have read of one person that had this happen....

 

If i'm not wrong,they don't sell the O-rings alone anymore.You would have to buy the trans temp connector.....

 

although you can get just the orings, the preferred method is to replace the guide bushing which includes the orings.
careful tightening the center bolt on the guide bushing. very low torque (23 in/lbs IIRC) and easy to strip the threads on the lead frame.

 

Just got back. The transmission was overfilled by 1.1L!!!

Had to drain via the electrical connector. I just pulled it out and allowed it to drain. I believe it was going up the dipstick it was so full.

It is drained and back to a good level at 77mm when the engine and tranny at full hot.

Maybe the overfilled was increasing the tranny case pressure which was forcing the fluid out the pan seal?

The connector was dry as a bone. It is not leaking there. Looks like the front passenger of the pan only.

 

Maybe the overfilled was increasing the tranny case pressure which was forcing the fluid out the pan seal?

I think that's what mine was doing. Glad you caught it. you checked trans temp out of park, right?

 

I checked it with the engine and tranny hot idling in park.

Went through all the gears before checking.

 

fluid level checked in park. fluid temperature checked in D/R.
internal pressure does not increase if over filled but fluid may get churned and create foam, which can be forced out the vent on top of the transmission. perhaps the pan gasket got damaged during service or is improperly installed.

 

I never checked it in Drive nor have I ever done that for any auto transmission. Heh, besides, I don't even want to touch that emergency for any reason. Seize up!

In park at full hot, the level was 3 inches (8cm) above the hot line on the dipstick. I swore out loud when I saw that and referenced it with a new dipstick i made out of plumber strapping.

I can almost guarantee he didn't warm up the transmission. I even saw him come into the parts counter for an additional liter of fluid. I think i will be getting a refund for that fluid.

 

fluid temperature checked in drive/reverse when using a scan tool. fluid level is checked in mm from the bottom of the pan.
btw, how far north are you?

 

Dropped the fluid level, it still leaked. Went back to the dealer where they replaced the connector with the new part which was all of $14. Mind you they wanted to charge me 1.4 hours for it. I was only there for 45 minutes so it went down to an hour.

Just checked the car after 5 hours sitting and not a drop.

It was the bloody connector leaking again even after the TSB was done.

So from now on, if it is leaking, it is the connector regardless if the o-rings were once replaced.

 

Any pics showing where this is for future reference? (not too close up, if one pic, so people can see where it's at)...and still becoming familiar with these cars. I'd appreciate it. Thanks.

 

Sorry, no pics, its just above the passenger's side front of the tranny pan. You can't miss it.