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1992 300sl
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159 Posts
Discussion Starter #1
This may sound ridiculous, but I am wondering whether my 1992 300sl is shifting into 5th gear. I count the shifts, but starting in second I seem only to get two more shifts. What rpm should I be seeing at highway speeds, like 65 or 75, when it would be obvious that I should be in 5th gear? If it is not shifting into 5th, what could be the problems? The car has 77,000 miles and runs great. I have owned it for six months and it is my first Mercedes.
 

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00 SL500 SOLD, 05 SL600 Sport, 09 Silverado 4x4 LTZ,SOLD '15Silverado LTZ 6.2 8Speed John Deere 318
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1,781 Posts
I COULD be wrong but I think that you ONLY have a 4 speed auto. in your car, (Trust me, If I'm wrong someone WILL correct Me!!!) I thought that the 5 speed started in about 1997 or so.
 

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2000 Obsidian Black Metallic Mercedes SL 320 V6
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I COULD be wrong but I think that you ONLY have a 4 speed auto. in your car, (Trust me, If I'm wrong someone WILL correct Me!!!) I thought that the 5 speed started in about 1997 or so.
Ditto drags1998 his car has the 4 speed tranny.

Cheers.
 

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Departed 1998 SL500 (and the Pano is in Bogota)
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11,106 Posts
I think those 4-speed do not have locking converter either, so the RPM will depend on how much slippage there is.
 

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1998 Pano SL500; 1993 SL500; 2005 ML270cdi
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8,834 Posts
I have a 1990 300sl with 5sp trust me e mail me been through it all you have the 722.500 trany
Thanks drr for surprising everyone :thumbsup:

If you have a solution or advice please post it into this topic for future reference as well as emailing to the original poster.
 

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00 SL500 SOLD, 05 SL600 Sport, 09 Silverado 4x4 LTZ,SOLD '15Silverado LTZ 6.2 8Speed John Deere 318
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After looking at 15-20 1990-1994 300SL's My research tells me that these cars have a 4 speed trans in both the Euro and U.S. versions, (Again, Please correct Me if I am wrong). But also provide pictures of the car in question. with a pic. of the shifter, showing 4th and Drive on the Bezel, Thanks!!!!!
 

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93 500SEL DOA - PARTING OUT, 08 CLK350 Cab -DOA, '05 CLK500 Cab (hers), '10 Razor Elec Scooter (his)
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1,062 Posts
Actually, WIS shows 722.352 (4 spd) or 722.500 (5 spd) coupled to m104 powerplant in 300SL. So, I guess you could say it depends. A VIN would be helpful...
 

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2000 Obsidian Black Metallic Mercedes SL 320 V6
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Actually, WIS shows 722.352 (4 spd) or 722.500 (5 spd) coupled to m104 powerplant in 300SL. So, I guess you could say it depends. A VIN would be helpful...
Honestly I had a doubt yesterday after reading a previous post written after mine but at this point I'm starting to feel that the 722.500 is the manual gearbox.
Can someone confirm that ? I'm saying this because I remember the 5 speed autobox was introduced on 6 cylinders in 1995-96 only and later (maybe 1997) on 8 and 12 cylinders.

Cheers.
 

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00 SL500 SOLD, 05 SL600 Sport, 09 Silverado 4x4 LTZ,SOLD '15Silverado LTZ 6.2 8Speed John Deere 318
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So, to answer jnf300sl's question correctly we must know if the Bezel around the shifter has 1-2-3-4-D on it? If it does then it is a 5spd. If it says anything but, then its a 4spd.Annnnnyyyyyway, getting back to the QUESTION at hand, IF, Its a 5spd. there is either a valve or an eletric solonoid that controls OVERDRIVE, This could be where your problem lyes. Sorry to drag this out for so long, but it helps to get as much info as possible.
 

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1992 300sl
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159 Posts
Discussion Starter #12
Thanks to all of you. My shifter bezel is 234D, with the D to the right of 4. I will record the VIN this evening and post it tomorrow.
 

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Departed 1998 SL500 (and the Pano is in Bogota)
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While the electronically controlled 5-speed did not appear till the 1996? I think the older 500SL had the 4-speed but the 300SL may have a 5-speed option, both were hydraulically controlled. The 5-sp was not offered as option for the 500 as it could not handle the torque of the V8.
And again, those older transmissions may not have locking torque converters, so the RPM will be affected by slippage.
 

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1990 300SL
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9 Posts
I have the 5 speed automatic as well in a 1990 300 SL (722500 02 384204 ) and is confirmed by the VIN info at the Russian club site. So I guess it all depends on how your particular car is optioned.This is a U.S. spec. car .
 

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1992 300sl
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159 Posts
Discussion Starter #16
I read the owners manual last evening and it clearly shows the 5spd manual and 5spd auto for the 300sl and the 4spd manual for the 500sl. My shift bezel is exactly as shown in the owners manual for the 5spd auto. The VIN is WDBFA61E7NF055665. One post directed me to a switch or solenoid as the potential remedy. Has anyone had direct experience with the issue?
 
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