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  #1  
Old 08-24-2004, 06:56 AM
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Join Date: Feb 2001
Location: Northumberland, UK
Posts: 1,294
Checking 722.6 transmission fluid level

I wish to check the transmission fluid level on my 1999 R129 SL500. It has a 722.624 transmission. I have ordered the special tool and parts from the dealer. I understand I should check the level at 25 deg C and again at 80 deg C. My questions are simple and probably stupid:

1. Do I check the fluid level with the engine running?
2. In what position should the transmission selector lever be when I check the level.

I have assumed that should I check the level at 25 deg C with the engine off and the transmission in P. I also assume that I should check the level at 80 deg C with the engine off and selector in P, and then check it again with the engine running and the car in P.

Thanks in advance.
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JJ Rodger
1999 SL 500
1993 320 TE
1986 500 SEC
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  #2  
Old 08-24-2004, 12:33 PM
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Join Date: Apr 2000
Location: eastern NC
Posts: 149
Check with engine running on a level surface in Park! Make sure you are at operating temperature.
Mike
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  #3  
Old 08-26-2004, 06:08 AM
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Join Date: Feb 2001
Location: Northumberland, UK
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I've checked it and it seems to me to be too full. The level comes right past the uppermost mark and up to the top of the measuring part of the dipstick. The dealer does not seem to think this is the end of the world and the soonest he can look at the car is 14 September.

Meanwhile, I am concerned about my transmission:

Full load upshifts from 1st to 2nd are noticeably jerky. These used to be slurred just so.

Downshifts from 3rd to 2nd are jerky, too.

Often the transmission seems hesitant or reluctant to change.

There is no slippage at any time.

Changes at less than full load and between other ranges are generally OK.

Any ideas?
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JJ Rodger
1999 SL 500
1993 320 TE
1986 500 SEC
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  #4  
Old 09-01-2004, 12:33 AM
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Join Date: Sep 2004
Posts: 10
Let me know the outcome

I was just reading about your transmission problems. I have similar problem with my 98 sl500 not shifting out of first or late shifts. I was wondering if you could post the MB diagnostics and repair of your vehicle so I have a heads up on what it's going to cost me. Thanks
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  #5  
Old 09-02-2004, 07:37 AM
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Join Date: Feb 2001
Location: Northumberland, UK
Posts: 1,294
New Mass Airflow sensor: GBP250, about half an hour fitted.

I had the car in to the dealer today because I was really worried about it. The tech drove the car about 500yards, said this isn't the transmission, it's engine management, probably the MAA. He put it on the machine and apparently his diagnosis was confirmed. He showed me the print out but I can't remember what it said. The tech explained that when the air flow meter is defective, this can retard gearshifts and and generally confuse the car; the engine also felt down on power.

Sure enough, it runs like a dream again. Phew. Now, what can I do with that GBP5,000 I set aside for a new transmission...
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JJ Rodger
1999 SL 500
1993 320 TE
1986 500 SEC
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  #6  
Old 09-02-2004, 06:00 PM
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Join Date: Sep 2004
Posts: 10
I guess that sound logical. Did you have any codes set in computer? and as far as the 5,000 you saved up....I could use a few bucks
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  #7  
Old 09-03-2004, 04:03 AM
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Join Date: Feb 2001
Location: Northumberland, UK
Posts: 1,294
There were two codes stored in the computer, but I cannot remember what they were. As for my savings, well, my better half has got them spent already. We really do need a new bathroom...
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JJ Rodger
1999 SL 500
1993 320 TE
1986 500 SEC
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