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2009 E350
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23 Posts
Discussion Starter #1
I notice one of the big differences in the early R230's (2003 vs 2004) is the 5G and 7G transmissions.

I currently drive a W211 with the 7G-tronic, and it's all great and fun. How does the 5G-tronic stand up to it? I'm thinking about buying a used SL500, and I'm not sure if there's a big difference between the 2003 and 2004 models. Which do you prefer/recommend?
 

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SL500R, 500SL, C230, 560SL, 560SEL, 450SL, 450SLC, 300CD.
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146 Posts
Performance and handling VS comfort and economy. You make the decision.
Incidentally all V12s come with the 5G issue. IIRC.
 

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'11 Santa Fe LTD V6 AWD-Navi, '99 CLK 320 (traded for family mover), '96 200SX (SOLD) :(
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528 Posts
Old post, but food for thought...The 5G is capable of 796 lb-ft of torque whereas the 7G can only handle 542 lb-ft. Probably manufactured with smaller components to keep a similar sized package, thus weaker.
 

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2004 S500L
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11 Posts
Hello everyone! I have 2004 S500L with 5- speed transmission in it. Can I swap the 5- speed with 7G- Tronic 722.9 transmission? Is it plug and play or I have to do something more complicated? :)
 

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Coupe/Convertible Forums Moderator
CURRENT: 2011 SL550 FORMER: C300, ML350, CLK550 Cabriolet, C240, ML320, 300TD
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20,034 Posts
It's a bolt-on and would fit, but the electronics would be a huge issue. I am sure it's "possible", but it would require a lot of hacking. The TCU on the 722.9 is a theft-relevant parts that requires SCN coding.
 
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