- Mercedes Benz E Class AMG: How to check Transmission fluid
Step by step instructions for do-it-yourself repairs
2005 E320 Transmission Fluid Maintance Question
approved for MB NSB-1.
They replaced the fluid and turned on the car but the transmission never worked or engaged they indiacted its the wrong transmission fluid and I would need to get MB Fluid at the dealer. I towed it to a MB service tech and what I'm going to ask them to do is to Flush the system and replace it with MB fluid.
My Question, with what happened would this of damaged my transmission ?
I was hoping my first posting would be a bit more magnanimous.My car is a 2003 E320. There are tons of postings on how to change the transmission fluid and filter as well as the electrical adapter that was leaking. I changed the electrical adapter, dropped the old fluid, changed the filter, cleaned up the pan, and refilled via the dipstick tube.
I started the car in order to warm up the fluid, but the car would not go into gear. Hmmm...I checked the fluid level with the dipstick tool and I could not get a good reading. It seemed like the pump was not priming, so I dumped in another quart. Still no dice. I sprayed the electrical connector and checked the Transmission Control Module for dampness. Still no go. The last thing I could think of was to check the new filter to make sure it was seated properly. I didn't want to do this as it meant dropping the new tranny fluid, but, I had no choice. Oh well...I put the drain pan under the car, pulled out the plug and.....not a drop came out!

I bet you are now thinking, "OK, where did the juice go?" I thought the same thing. From under the car, I could see the top of the dipstick tube. I followed it, by hand, all the way down to the pan.....Engine oil pan, that is!

After a minute or two, I found where the correct dipstick tube enters the transmission. I followed it back up to the engine compartment, right next to and below the engine oil dipstick tube. Without pulling the air cleaner boxes off, it is very difficult to see the transmission dipstick tube.
Needless to say, I had to change the oil again in order to get the trans fluid out as well as had to buy more trans fluid. The good news is, Mama has her car back!
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This was great fun. Now I had to change engine Oil AND add more transmission fluid at $20/qt. So after dropping about another $150 for fluids due to my error and MB not properly labeling the tubes I wanted others to learn from the mistake. Unfortunately this was probably before many on this site were joined up.
We should learn from each others success and mistakes. This is how we help each other learn. Front airmatic strut de pressurization to install is another KEY point to learn if you ever plan to do this work.
So hopefully someone learns from my bonehead error. I hope they do and save some problems. My guess is AAMCO did exactly what I did.
One minor point. NEVER use any UN APPROVED OIL OR ADDITIVE IN A MB transmission. If you do let us know how it works out over the loing term. MB is pretty specific on the fluids.
Hope this helps everyone learn from my error.


When you begin to check number of post on each individual you will see I have well over 2000 so I have learned a lot on this site and my intent is to help others when I can. Sometimes I have been successful, sometimes not.
Last edited by vettdvr; Feb 25, 2012 at 08:58 AM.
I don't know any Engineer who has actually done Engineering that hasn't made a mistake. But those that might admit it are of course few.
The Valvoline trans fluid has not missed a beat.
Last edited by Engineer1; Mar 26, 2012 at 09:23 AM. Reason: Typo
All of this could have been avoided if MB had clearly labeled the tubes.
But then I remember a generator on a 64 falcon that had a mushroomed shaft after trying to tap off the pulley. Amazing how far that generator could fly.
So of course I have made a few mistakes across the years. But 6 months ago when I Installed timing gears/magneto/timing/oil seals/and reassembled a Jabriu 3300 aircraft engine there were no mistakes. The engine went together like a Swiss watch and flew great. When taking off over the trees I know the engine was put together "BY THE BOOK".





