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Old 06-06-2001, 05:12 PM
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Join Date: Aug 2000
Location: Western NC
Posts: 30
car has 245K miles on it and I want to go to RedLine synthetic trans fluid (or something better, any suggestions??). The trans also leaks a bit of fluid. Main reason for change is age of trans and it slips a little, and hesitates sometimes. SO, a couple of questions- who has done this, is it recommended/beneficial? And if so, any tips/tricks to actually changing it myself? Tools? New filter? Any suggestions are welcomed. TIA
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Old 06-06-2001, 05:24 PM
David C Klasse's Avatar
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Join Date: Jan 2001
Location: Mission Hills in the City of San Diego
Posts: 2,352
If you have a slightly leaky transmission, then I wouldn't use synthetic in it. The reason is that synthetic is a 'thinner' oil, and will more than likely make your leaks worse. I would simply use a good dino trans fluid.
Also, if you don't know when the fluid was last changed, I have heard that you should change it and drive it for 1 or 2 thousand miles, and then change it again, because this will dislodge all of the sludge and so on. Good luck.
2006 E350 w/ 155k miles (Daily Driver)

1993 300E 3.2L Sedan w/ close to about 300k miles
2003 E500 Brilliant Silver (Had 217k miles when totalled!)
1989 300E with 289,000 miles (had for <1 yr while in HI)
03 CLK 500 cabrio (Mom's)
2006 C230k (Dad's)
1999 S420 (Mom's/Dad's)
2000 C230k Sport sedans
2001 CLK320 Cabrio (Mom's)
1995 C280 My First Mercedes-Benz... (155k miles. EXCEPTIONAL AUTOMOBILE. Was Very hard to let go of!)
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Old 06-06-2001, 06:43 PM
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Join Date: Apr 2000
Location: San Antonio, TX
Posts: 387
I could be incorrect here, but I believe the stories on synthetics making leaks worse is from the days of Mobil 1 0w-30. Now that they have more "conventional" multiweights, the problems don't occur as often...

For changing the transmission fluid... Not a big deal at all. Get a kit from Partshop. Wait for it to arrive... Then do a search here to get info, it's been done before. You MUST drain the torque converter, so I start there (if you can't get that to work, you are out of luck...). Really it's the only pain. The biggest thing to remember is to be absolutely meticulous - keep ALL foreign matter out of the pan.
Bill Streep
San Antonio
'57 190SL (toy)
'08 S5500 (mine)
'09 CLK550 (wife's)
'06 SLK350 (daughter's)
'11 GLK350 (daughter's)
'03 CLK310 (spare)
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Old 06-07-2001, 12:00 AM
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Join Date: May 2000
Location: Scotts Valley, CA.
Posts: 145

Torque specs are in INCH-POUNDS, NOT foot-pounds. VERY little torque is used on these bolts. I went through this with my wife's 190E about 6 months ago but didn't have the correct torque spec / wrench. I over-torqued the bolts and it ended up puking all of the Mobil-1 ATF on the ground in the parking lot at my wife's office (53 miles from home, one way!).
Thank God for AAA-Plus (100 mile towing - on a flatbed in this case!). My regular shop just dropped the pan, put in a new filter and filled 'er up (using conventional ATF). I was grateful that it didn't cost me $2500-3000 for a rebuilt trans and labor.
Jay Yambrovich
Scotts Valley, CA.

1993 300 CE Cabriolet (A124) 131K miles
1997 C-280 133K miles

2000 BMW R1100RT 69K miles
1989 300 E 216K miles (sold)
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