Parts Catalog Accessories Catalog How To Articles Tech Forums
Call Pelican Parts at 888-280-7799
Shopping Cart Cart | Project List | Order Status | Help

Go Back   PeachParts Mercedes-Benz Forum > Mercedes-Benz Tech Information and Support > Tech Help

LinkBack Thread Tools Display Modes
Old 09-29-2009, 02:40 PM
mbzman's Avatar
Registered User
Join Date: Nov 2008
Location: Canada
Posts: 600
Fluid changes

Hi guys, I'm going to be servicing my '89 300CE in the next couple of weeks to get it ready for winter. I'm going to be changing the transmission fluid and filter but have a few questions. Firstly, how can I get most of the fluid out? I believe there is a drain on the torque converter, correct?

Do many of you run synthetic fluid in your older Mercedes' transmission without any problems? If so, what brands do you recommend? I'm also thinking of going with a thinner grade of oil, possibly a 5W-40 Rotella as opposed to the 15W-40 that is in the car now. How does the M103 take the thinner weights? I have had the top end and head gasket replaced so I'm not concerned with oil leaks, at least not yet...

Reply With Quote
Old 09-29-2009, 03:57 PM
Posts: n/a
There is a drain plug on the pan and there are several in the torque converter. Just turn the engine SAFELY until one of the torque converter drain plugs is at the bottom. Drain the pan and the torque converter and refill. Make SURE that you get the correct reading on the stick under the CORRECT temperature conditions.

Especially in your climate, there is no need for synthetic ATF IMHO. The 5W 40 might be a good choice for your climate. The M103 has sliding cam followers as opposed to flat tappet, so it might not be necessary to run the Fleet type oil in the engine. I like the added detergents for keeping it clean, and with a flat tappet engine the zinc additive to some level is necessary, but in your situation I would think that a good 5W30 would get the job done.

My $0.02,
Reply With Quote
Old 09-30-2009, 12:50 PM
mbzman's Avatar
Registered User
Join Date: Nov 2008
Location: Canada
Posts: 600
I will go with the regular ATF fluid then. It is Dexron III, correct? What intervals should the fluid and filter be done at? Would every 15k miles be too soon? I'm also thinking of changing out the PS fluid. I believe I can only use the dealer only stuff if I'm not mistaken. I also need to think about possibly changing the battery. Are the OEM Mercedes batteries really worth the extra cost over an aftermarket replacement?
Reply With Quote
Old 09-30-2009, 01:16 PM
Registered User
Join Date: Jun 1999
Location: Albuquerque, NM USA
Posts: 1,946
Just put in synthetic and quit worrying forever about "thick" and "thin."

Kent Christensen
'07 GL320CDI, '06 SLK350
Reply With Quote


Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On
Trackbacks are On
Pingbacks are On
Refbacks are On

All times are GMT -4. The time now is 07:27 PM.

Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2020, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0
Copyright 2018 Pelican Parts, LLC - Posts may be archived for display on the Peach Parts or Pelican Parts Website -    DMCA Registered Agent Contact Page