E550 convertible faster than E550 4Matic sedan with same tune!
My friends W212 (facelift) 2017 E550 rear wheel drive convertible Eurocharged tuned with primary and secondary resonators deleted
My W212 (facelift) 2015 E550 4Matic sedan Eurocharged tuned with primary and secondary resonators deleted
Okay so my friend and I both have Eurocharged Stage 1 ECU tuned W212 Biturbo E550’s. Both with primary and secondary resonators deleted while the catalytic converters and stock mufflers remained. My car is a 4-door 2015 4Matic sedan while his is a 2017 rear wheel drive convertible. Mine was tuned last August 2018 while his was tuned during the summer of 2017. We both use 94 octane gas from Petro Canada.
We drove each other’s cars the other day and I came away extremely disappointed to learn that his car accelerates like a BEAST compared to mine! It pins your shoulders to the seat back with incredible force far greater than mine and is so fast that it’s a little scary to drive.
I truly didn’t expect there to be such a great difference in the power generated by the same engines tuned by the same company with the sane exhaust mods. I realize there is more power loss at the wheel for 4Matic cars vs rear wheel drive cars but not this noticeable. His car was far more responsive in all gears, had far more torque and just felt like a BEAST is the best way I can describe the overall driving experience.
Has anybody else experienced this or have any other theories why there is such a big difference between the two cars?
Thanks in advance
michael






Seriously, the pano roof on the sedan adds hundreds of pounds over the basic sedan, while the ragtop on the other subtracts hundreds. The differential could easily top 500-600 lbs?
Delete the weight of 2 doors vs a 4dr makes a difference too.
Subject to correction (because I am not certain) but isn't the 2dr built on a completely different and lighter chassis (C-Class) vs the sedan?
IMO, 4wd is advantageous for cornering (moreso in the wet), but is just a weight penalty for straight line acceleration... OP already acknowledges this.
And -- to put a fine point on it -- the unsprung weight of the sedan's 20"(?) wheels may look good to some (SHOW dept), but will also hold you back in the speed (GO) dept. Formula One racing wheels are 13" for this reason (in addition to limiting brake size)
There's a price to pay for everything.
Last edited by DFWdude; Jul 24, 2019 at 08:22 AM.





Seriously, the pano roof on the sedan adds hundreds of pounds over the basic sedan, while the ragtop on the other subtracts hundreds. The differential could easily top 500-600 lbs?
Delete the weight of 2 doors vs a 4dr makes a difference too.
Subject to correction (because I am not certain) but isn't the 2dr built on a completely different and lighter chassis (C-Class) vs the sedan?
IMO, 4wd is advantageous for cornering (moreso in the wet), but is just a weight penalty for straight line acceleration... OP already acknowledges this.
And -- to put a fine point on it -- the unsprung weight of the sedan's 20"(?) wheels may look good to some (SHOW dept), but will also hold you back in the speed (GO) dept. Formula One racing wheels are 13" for this reason (in addition to limiting brake size)
There's a price to pay for everything.

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It depends. AWD is also advantageous in straight-line acceleration, even in the dry, when your engine is able to overwhelm two drive wheels. However, there will be a cross-over point when having more traction is overwhelmed by the extra weight of the W212 with panoroof. Cornering in the wet or dry should be similar, unless you're trying to put as much power down as possible, as early as possible.
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and your right about the awd.... my gle63s is heavy... but it will walk a new corvette off the line, but they catch up quick once they get going.... of course im a jerk and i let off before they pass me
Last edited by mrmotoguzzi00; Jul 24, 2019 at 02:13 PM. Reason: added more stuff...
We have pretty much the same car as you, OP - not a fan of the stripes but to each his own and the rest of the car looks very nice...Oops, on edit you have a 2015 - ours is the 4.7 biturbo...
Last edited by diesel_dan; Jul 24, 2019 at 03:01 PM.

Seriously, the pano roof on the sedan adds hundreds of pounds over the basic sedan, while the ragtop on the other subtracts hundreds. The differential could easily top 500-600 lbs?
Delete the weight of 2 doors vs a 4dr makes a difference too.
Subject to correction (because I am not certain) but isn't the 2dr built on a completely different and lighter chassis (C-Class) vs the sedan?
IMO, 4wd is advantageous for cornering (moreso in the wet), but is just a weight penalty for straight line acceleration... OP already acknowledges this.
And -- to put a fine point on it -- the unsprung weight of the sedan's 20"(?) wheels may look good to some (SHOW dept), but will also hold you back in the speed (GO) dept. Formula One racing wheels are 13" for this reason (in addition to limiting brake size)
There's a price to pay for everything.

You are up in Canada, so maybe they continued offering the 4.7 in MY 2015 up there. In the states they were only in the E sedans from MY 2012 - 2014...
Yes, there is also the weight differences.
Yes, there is also the weight differences.
2017 E550 Cabriolet Coupe weighs about 4000 lbs (C238 chassis) [also only a 7 speed transmission, not 9 speed according to MB USA]
2015 E550 Sedan weighs about 4300 lbs (W213 chassis)
So with the penalty of AWD and approx 300 or so lbs the sedan will feel and be slower. You're going to see a 2-3 tenth difference in their 1/4 mile times. That coupled with what appears to be larger, heavier wheels on the Sedan, will also make a difference of another .1-.2 seconds.
2017 E550 Cabriolet Coupe weighs about 4000 lbs (C238 chassis) [also only a 7 speed transmission, not 9 speed according to MB USA]
2015 E550 Sedan weighs about 4300 lbs (W213 chassis)
So with the penalty of AWD and approx 300 or so lbs the sedan will feel and be slower. You're going to see a 2-3 tenth difference in their 1/4 mile times. That coupled with what appears to be larger, heavier wheels on the Sedan, will also make a difference of another .1-.2 seconds.



I am a bit surprised that AWD E550 accelerates slower than heavier RWD Convertible...
https://media.mbusa.com/releases/201...specifications
Bearing in mind that the models between US and other countries can vary quite a bit, as I understand it.
497hp and 653 torque
Thanks to all for your comments and replies to this thread. I had my car (2015 E550 4-matic sedan) re-flashed at Eurocharged today and it solved all my lack of power issues!!
I'm now pushing 497hp and 653 torque at the wheels! My car now accelerates like a BEAST and pins my shoulders to the seat back with incredible force!! My buddies convertible is no match for my car now!
The updated file that Eurocharged flashed my ECU with added 50hp and I’m no longer jealous of my buddy’s convertible.
497hp and 653 torque
Thanks to all for your comments and replies to this thread. I had my car (2015 E550 4-matic sedan) re-flashed at Eurocharged today and it solved all my lack of power issues!!
I'm now pushing 497hp and 653 torque at the wheels! My car now accelerates like a BEAST and pins my shoulders to the seat back with incredible force!! My buddies convertible is no match for my car now!
The updated file that Eurocharged flashed my ECU with added 50hp and I’m no longer jealous of my buddy’s convertible.
Great Numbers!!!!
Now, put it to DragStrip and see what this beast can do !!




