Renntech vs. EuroCharged Tune
Thread Starter
Junior Member
Joined: Dec 2019
Posts: 36
Likes: 3
From: Dallas
C63 S
Renntech vs. EuroCharged Tune
I'm going to get a tune on my car (18 63s), I'm trying to decide whether to go with Renntech or Eurocharged Stage 2. I'm not looking to do any hardware changes, just the ECU at this point.
They have similar performance aspects after the tune, so I'm just curious of others experience with each tune.
Also I noticed that a local MB dealer (Austin) is a Renntech dealer, I'm curious if I were to purchase the tuner from the dealer if any powertrain issues arose under warranty if they will cover it. Obviously there are risks when tuning a car (and they may cover the work regardless), I'm just wondering if they would give more grace if the tune was purchased from a dealer. I'm going to call MB next week, figured I would ask here in case anyone has had a similar experience.
They have similar performance aspects after the tune, so I'm just curious of others experience with each tune.
Also I noticed that a local MB dealer (Austin) is a Renntech dealer, I'm curious if I were to purchase the tuner from the dealer if any powertrain issues arose under warranty if they will cover it. Obviously there are risks when tuning a car (and they may cover the work regardless), I'm just wondering if they would give more grace if the tune was purchased from a dealer. I'm going to call MB next week, figured I would ask here in case anyone has had a similar experience.
Former Vendor of MBWorld
Joined: Dec 2005
Posts: 827
Likes: 152
From: Simi Valley, California
2018 C63 Sedan
Don't forget to consider the JB4 also, it's a little different relative to the flash maps in that it's a piggyback system that can be installed and removed/resold down the road. We have a FAQ that explains some of the differences: https://www.burgertuning.com/pages/faq
Newbie
Joined: Aug 2019
Posts: 12
Likes: 4
AMG C63S
I had the eurocharged stage 1 tune and kept throwing cylinder misfire check engine light. Acceleration wasn’t smooth and often had jerkiness. Went back and forth with them a few times and couldn’t get these resolved.
I ordered Renntech tune and should have the handheld tuner delivered on Monday. I’ll let you know how their tune performs after a few days.
I ordered Renntech tune and should have the handheld tuner delivered on Monday. I’ll let you know how their tune performs after a few days.
Junior Member
Joined: Apr 2018
Posts: 36
Likes: 6
2018 C63S Coupe
Also interested in the Renntech hand held tune. Please share how you like it and any noticeable changes.
I’m also curious if MB treats Renntech tunes different when going to get serviced or warranty work?
I’m also curious if MB treats Renntech tunes different when going to get serviced or warranty work?
Senior Member
Joined: Oct 2014
Posts: 288
Likes: 15
C63 W205 17' + W205 C250@brabus + NSX 95'
Had so many issues with JB4, ended up on tow car...
Spend 3 months trying to fix "issues" they blame car etc..
ended up with removing it, and did proper reflash with Velos, car is briliant..
stay away from jb4
Spend 3 months trying to fix "issues" they blame car etc..
ended up with removing it, and did proper reflash with Velos, car is briliant..
stay away from jb4
MBWorld Fanatic!
Joined: Jul 2011
Posts: 1,146
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2019 AMG GT R
I'm going to get a tune on my car (18 63s), I'm trying to decide whether to go with Renntech or Eurocharged Stage 2. I'm not looking to do any hardware changes, just the ECU at this point.
They have similar performance aspects after the tune, so I'm just curious of others experience with each tune.
Also I noticed that a local MB dealer (Austin) is a Renntech dealer, I'm curious if I were to purchase the tuner from the dealer if any powertrain issues arose under warranty if they will cover it. Obviously there are risks when tuning a car (and they may cover the work regardless), I'm just wondering if they would give more grace if the tune was purchased from a dealer. I'm going to call MB next week, figured I would ask here in case anyone has had a similar experience.
They have similar performance aspects after the tune, so I'm just curious of others experience with each tune.
Also I noticed that a local MB dealer (Austin) is a Renntech dealer, I'm curious if I were to purchase the tuner from the dealer if any powertrain issues arose under warranty if they will cover it. Obviously there are risks when tuning a car (and they may cover the work regardless), I'm just wondering if they would give more grace if the tune was purchased from a dealer. I'm going to call MB next week, figured I would ask here in case anyone has had a similar experience.
Former Vendor of MBWorld
Joined: Dec 2005
Posts: 827
Likes: 152
From: Simi Valley, California
2018 C63 Sedan
No other early car exhibited the same mix symptoms of misfire codes and rough idle so we suggested you send the system in so we could test it on our C63 and replace it for a new one for you. Since we've discovered a few things in the firmware we can change to address similar symptoms should they come up with another customer in the future.
We've tuned 100s of C63s successfully many on this forum so while your experience was very negative it's also uncommon and doesn't change the risks of flash tuning. At least the JB4 can be fully removed at home if something comes up.
Last edited by BMS; Jan 5, 2020 at 12:14 PM.
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Senior Member
Joined: Oct 2014
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C63 W205 17' + W205 C250@brabus + NSX 95'
Yes you had one of the first BETA systems and may have had faulty JB4 hardware. I remember your support thread here: https://www.n54tech.com/forums/showthread.php?t=58591
No other early car exhibited the same mix symptoms of misfire codes and rough idle so we suggested you send the system in so we could test it on our C63 and replace it for a new one for you. Since we've discovered a few things in the firmware we can change to address similar symptoms should they come up with another customer in the future.
We've tuned 100s of C63s successfully many on this forum so while your experience was very negative it's also uncommon and doesn't change the risks of flash tuning. At least the JB4 can be fully removed at home if something comes up.
No other early car exhibited the same mix symptoms of misfire codes and rough idle so we suggested you send the system in so we could test it on our C63 and replace it for a new one for you. Since we've discovered a few things in the firmware we can change to address similar symptoms should they come up with another customer in the future.
We've tuned 100s of C63s successfully many on this forum so while your experience was very negative it's also uncommon and doesn't change the risks of flash tuning. At least the JB4 can be fully removed at home if something comes up.
Your response wasn't refund me at least the money for the jb4 (I would send it back to you, for study purposes, or repair + resale , but dont want to receive ''new unit'' because I really dont trust this product anymore, you offered me credits ..I think its beta, and not so good product as your BMW JB4 seems to be. That was my biggest dissapointment...
There were multiple users having problems, at least 3 of them contacted me via mbworld forum.
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Thread Starter
Junior Member
Joined: Dec 2019
Posts: 36
Likes: 3
From: Dallas
C63 S
I had the eurocharged stage 1 tune and kept throwing cylinder misfire check engine light. Acceleration wasn’t smooth and often had jerkiness. Went back and forth with them a few times and couldn’t get these resolved.
I ordered Renntech tune and should have the handheld tuner delivered on Monday. I’ll let you know how their tune performs after a few days.
I ordered Renntech tune and should have the handheld tuner delivered on Monday. I’ll let you know how their tune performs after a few days.
Thread Starter
Junior Member
Joined: Dec 2019
Posts: 36
Likes: 3
From: Dallas
C63 S
Did you also do the downpipes? The tune and downpipes they advertise with autovlog is too over the top for me.
Senior Member
Joined: Oct 2014
Posts: 288
Likes: 15
C63 W205 17' + W205 C250@brabus + NSX 95'
Yes you had one of the first BETA systems and may have had faulty JB4 hardware. I remember your support thread here: https://www.n54tech.com/forums/showthread.php?t=58591
No other early car exhibited the same mix symptoms of misfire codes and rough idle so we suggested you send the system in so we could test it on our C63 and replace it for a new one for you. Since we've discovered a few things in the firmware we can change to address similar symptoms should they come up with another customer in the future.
We've tuned 100s of C63s successfully many on this forum so while your experience was very negative it's also uncommon and doesn't change the risks of flash tuning. At least the JB4 can be fully removed at home if something comes up.
No other early car exhibited the same mix symptoms of misfire codes and rough idle so we suggested you send the system in so we could test it on our C63 and replace it for a new one for you. Since we've discovered a few things in the firmware we can change to address similar symptoms should they come up with another customer in the future.
We've tuned 100s of C63s successfully many on this forum so while your experience was very negative it's also uncommon and doesn't change the risks of flash tuning. At least the JB4 can be fully removed at home if something comes up.
Former Vendor of MBWorld
Joined: Dec 2005
Posts: 827
Likes: 152
From: Simi Valley, California
2018 C63 Sedan
Of the ~6 JB4 C63 outstanding issues out there out of over 250 C63 customers I know 4 were resolved. 2 of those by regapping their plugs, 1 by replacing BETA wiring harness, and 1 with a JB4 firmware update. I know there are another few guys including you who are not resolved yet for various reasons. I'd encourage them to contact me directly so we can get them sorted. We do provide a 5 year warranty on the JB4 so some day when you or your JB4s next owner wants to move it forward I'd suggest sending the BETA JB4 in for replacement for a production unit as a first step.
If you search around you'll find C63 tuning problems not unique to the JB4. There are plenty of flash horror stories too. The difference is when things go sideways with a flash it's not as simple as removing the tune.
Last edited by BMS; Jan 5, 2020 at 01:06 PM.
MBWorld Fanatic!
Joined: Mar 2008
Posts: 3,632
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C63s Cabriolet, BMW M4, Civic
[QUOTE=BMS; over 250 C63 customers I know .[/QUOTE]
Wow ...that’s a lot. how is it that it so hard to find C63 owners with good reviews? I did a lot googled back then before I picked Dinan. I’m not bashing you. I’m just wondering.
Wow ...that’s a lot. how is it that it so hard to find C63 owners with good reviews? I did a lot googled back then before I picked Dinan. I’m not bashing you. I’m just wondering.
Last edited by Klinh; Jan 5, 2020 at 07:11 PM.
MBWorld Fanatic!
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2019 AMG GT R
Thanks
MBWorld Fanatic!
Joined: Mar 2008
Posts: 3,632
Likes: 150
C63s Cabriolet, BMW M4, Civic
MBWorld Fanatic!
Joined: Jun 2014
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From: IL
19 E63s, 23 M3 compX, B9 SQ5
Piggybacks all suck (the half-***, bandaid solution).
As mentioned above, I also had issues with my Eurocharged tune. Switched to DMEtuneing stage 2, and zero issues since. Renntech is great.
As mentioned above, I also had issues with my Eurocharged tune. Switched to DMEtuneing stage 2, and zero issues since. Renntech is great.
Former Vendor of MBWorld
Joined: Dec 2005
Posts: 827
Likes: 152
From: Simi Valley, California
2018 C63 Sedan
There are plenty of positive C63 JB4 reviews on n54tech, including even in the support thread where notabenex outlined his issues. I don't spend as much time on this forum so I'd have to search to see what is posted here. But this forum is mostly dominated by flash tuning marketing. And don't get me wrong, flash tuning can be great, but just understand what you're getting in to with it.
Last edited by BMS; Jan 5, 2020 at 08:23 PM.
Junior Member
Joined: Apr 2019
Posts: 33
Likes: 2
C63 AMG
I’d check out Velos Designwerks. Excellent power delivery and they have a handheld option. Full disclosure, I’m a Velos dealer, but I absolutely love the tune. Has a nice linear power delivery and pulls hard to redline. DM if you’re interested in chatting more.
Former Vendor of MBWorld
Joined: Apr 2013
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From: Miami, Fl
Mercedes C63S AMG (W205)
Thread Starter
Junior Member
Joined: Dec 2019
Posts: 36
Likes: 3
From: Dallas
C63 S
Where did you get your grill? Did you do downpipes, or just the stage 2 tune?
Super Member
Joined: Dec 2011
Posts: 557
Likes: 71
2016 C63S
If you want the absolute best (proven, knowledgeable, reliable, smooth, perfect customer support and sales), go with Renntech. They are the leaders for AMG tuning for many many years for a reason.
Like others, I tried cheaper solutions and did not have the experience I wanted. Personally, I don’t have time for CELs, diagnosing all the time, changing plug gaps, etc.
Renntech is super easy and stress free.
Like others, I tried cheaper solutions and did not have the experience I wanted. Personally, I don’t have time for CELs, diagnosing all the time, changing plug gaps, etc.
Renntech is super easy and stress free.
Senior Member
Joined: Oct 2014
Posts: 288
Likes: 15
C63 W205 17' + W205 C250@brabus + NSX 95'
If you want the absolute best (proven, knowledgeable, reliable, smooth, perfect customer support and sales), go with Renntech. They are the leaders for AMG tuning for many many years for a reason.
Like others, I tried cheaper solutions and did not have the experience I wanted. Personally, I don’t have time for CELs, diagnosing all the time, changing plug gaps, etc.
Renntech is super easy and stress free.
Like others, I tried cheaper solutions and did not have the experience I wanted. Personally, I don’t have time for CELs, diagnosing all the time, changing plug gaps, etc.
Renntech is super easy and stress free.
You are talking about JB4? I remember your nickname from n54tech.. BMS there were only 2users with problems so probably its just us... blah blah
I am happy that you solved your problems with removing jb4 sh*t and having fun with you c63 again 😎
