SL/R231: Tuning a 2017 SL450
Thanks in advance for your help. I'm not sure if I'll actually do this, but I would like to understand the good and bad about tuning.
Steve Meltsner
Thanks in advance for your help. I'm not sure if I'll actually do this, but I would like to understand the good and bad about tuning.
Steve Meltsner
Steve
https://www.racechip-usa.com/chiptun...31)/450-270kw/
Steve
https://www.racechip-usa.com/chiptun...31)/450-270kw/
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sounds good. I only mention this because there is another thread going on here with the new Dinan release that should cover your model and engine. One of the members just got his car tuned and seems very happy and a group buy for this unit is being organized now so it should be anytime!
"We do not offer anything for the SL450 or any of the 3.0L motor equipped vehicles at present. We have a few cars in testing so it is in the works but jut not available yet."
Then, about 10 minutes ago, someone from Dinan called and we talked about if they were going to be creating the technology for the SL. He said that "they are working on it", but couldn't/wouldn't commit to it either becoming a reality, or if it did, when it would be available. He said to just keep checking back. He also mentioned that if/when it does come out, it'll only have a one year warranty.
"We do not offer anything for the SL450 or any of the 3.0L motor equipped vehicles at present. We have a few cars in testing so it is in the works but jut not available yet."
Then, about 10 minutes ago, someone from Dinan called and we talked about if they were going to be creating the technology for the SL. He said that "they are working on it", but couldn't/wouldn't commit to it either becoming a reality, or if it did, when it would be available. He said to just keep checking back. He also mentioned that if/when it does come out, it'll only have a one year warranty.
Look at auto talent and you will see the group buy going on now for this tuner for your car . I have one on mine and really like it . Wayne and his C400 has already been the beta tester for Dinan and is posting on it now with good results !!




Look at auto talent and you will see the group buy going on now for this tuner for your car . I have one on mine and really like it . Wayne and his C400 has already been the beta tester for Dinan and is posting on it now with good results !!
There are plenty MB tuning companies.
Also remember several BMW members with significant Dinan upgrades and mediocre performance gains...




I understand that in lieu of driving both extensively, reviews are a great reference but the difference is just some 130 lbs. To me, this is negligible...
The SL400/450 is a very fine car and a great value, no doubt, it just lacks some punch for my taste.
Having driven nearly 5000 miles in SL400's in Europe, much of it in Germany, I had some opportunities to compare those two variants and their handling.
I understand that in lieu of driving both extensively, reviews are a great reference but the difference is just some 130 lbs. To me, this is negligible...
The SL400/450 is a very fine car and a great value, no doubt, it just lacks some punch for my taste.
Having driven nearly 5000 miles in SL400's in Europe, much of it in Germany, I had some opportunities to compare those two variants and their handling.
I guess it also depends on which version you drove. The facelift has ~50hp more and the new motor mated with the 9 speed gearbox is a combination the reviewers all like.
The 130lbs extra weight in the 500 is from the engine, right over the front wheels, and is bound (not having driven one very far or fast) to make a handling difference.
Personally I looked at and drove both and found the 400/450 has more than enough power for what I want which, is to go touring in Europe. However some may have purchased a 400 and find it wanting so no reason not to tune it.
I already have a trip booked to Scotland in May, France / Germany (AMG and Porsche factory visits) in June and currently planning a drive down Stelvio pass August / September with a friend, who has a 911 S4, en route to his place in Tuscany.
Last edited by rorywquin; Mar 5, 2017 at 08:37 AM.




The 130lbs extra weight in the 500 is from the engine, right over the front wheels, and is bound (not having driven one very far or fast) to make a handling difference.
Personally I looked at and drove both and found the 400/450 has more than enough power for what I want which, is to go touring in Europe. However some may have purchased a 400 and find it wanting so no reason not to tune it.
I already have a trip booked to Scotland in May, France / Germany (AMG and Porsche factory visits) in June and currently planning a drive down Stelvio pass August / September with a friend, who has a 911 S4, en route to his place in Tuscany. 
I did drive both versions. I pushed the newer one hard in Germany and had some mountain driving since we stayed in Switzerland. Took the Splügen Pass from Lake Como on the way to Munich. The SL did very well and was fun to drive on very tight serpentine roads.
That pass has a couple very tight spots in tunnels which literally doesn't allow two large vehicle to pass at the same time.
Back to the ongoing discussions of V6 vs. V8, my point is that both cars are great cars and people pick either model for one reason or another. It's simply a matter what priorities people place on certain attributes...
But to make the SL550 sounds like a less agile car is just laughable. It's a non-argument. Clocking thousands of miles back to back between the current SL400 and our SL550 confirmed that.
Pic of our (dirty) last ride in Europe

agreed, but in all fairness Dinan has never boasted about the "highest HP" out there. They are the gentlemen's hot rod if you will of the industry. nice linear power gains and a focus on vehicle drivability and longevity has always been their claim to fame. Seems like for over 30 years they have done something right . And at some point companies need to branch out, to me it makes sense for Dinan to do MB, Audi etc. They are known worldwide for their BMW stuff, sticking with Euro and what they know best is a good business move to expand beyond BMW
Sorry - I cannot agree with you.
Take two identical cars except one has more power but also weighs ~130Lbs more (all on the front wheels) and then argue that the handling is identical is laughable. It has to affect the balance of the car and therefore the handling.
I don't have to drive both to know that!




Take two identical cars except one has more power but also weighs ~130Lbs more (all on the front wheels) and then argue that the handling is identical is laughable. It has to affect the balance of the car and therefore the handling.
I don't have to drive both to know that!
I suppose I should have used different verbiage. I am not arguing about physics; after all, the SL is neither mid-engined, nor a lightweight, nor a sports car. It is very capable but designed for different priorities.
This is a luxo top-down cruiser designed for comfort.
This car was designed with the V8 as the base engine in regards to suspension/weight distribution. It was designed to accommodate smaller and larger engine variants. Without a doubt the aging V12 engine places a larger burden on the drive dynamics.
So in regards to my prior post I will use the term negligible impact.
We all have our own experiences with the SL and also our own preferences which we share here. Opinions obviously vary by personal priorities.
If you feel that you have a good understanding about the differences by looking at a spec sheet or driving one for a dozen miles or so, then more power to you. My conclusions came from a longer driving experience that I shared here.
Funny thing is what bothered me most about the V6 SL is the exhaust sound. Loud and sporty, but tiring during a full day of top-down driving (in sport/sport plus mode) and an engine that didn't quite backup the sound.
I wish that MB would offer a quieter exhaust option for the SL400/450
Last edited by Wolfman; Mar 8, 2017 at 01:47 PM.
I wish that MB would offer a quieter exhaust option for the SL400/450
I have the M/// Performance exhaust now, which is a bit louder but not like Sue's SL400.



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