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The JB+ tune does have some mixed reviews in regards to having safe/limp mode kick in and your ECU disabling the power from your car.
The chip comes set to a default setting that burgertuning recommends. The tune pushes about 21PSI from stock 16PSI when it is set to 60%. Climate, elevation, driving conditions all take account into why your car might go into limp mode, even at the default setting from burgertuning. Since there is a knob that you can turn, if your car does go into limp mode, you drop the tune down to 50% and test it there. You can keep going down if needed.
This does this to the car because the ECU still has a boost level cut off, so if it reads that the car is spiking in PSI above a certain limit, it will put your car in safe mode until you shut the car off and restart it. The default setting on the tuner is safe for a majority of the c250s.
My car is currently set at 70%, 10% higher than the default tune, and I have not hit limp mode yet. I am considering raising it to 80% to test it out and see if my car can handle the power.
In my opinion, it changed my car's driving characteristics drastically. "Economy mode feels like Sport mode...and Sport mode feels like crack" said the prior owner of my tuner LOL. Which is 100% accurate. I also bought the burgertuning intake as well, which makes the spool sound so lovely, and the blow off valve is audible from inside and outside the cabin.
The tune is worth every penny but you have to be hands on when needed. The install/uninstall is 5 minutes and is easy to hide under the hood.
funny you say that cause the loaners i have had, all drive like they are on crack cause i think people have been flogging them in S mode . The C250 in our house, my dad drives it everyday in E mode, so when i drive it occasionally, its a little slow to wake up lol. I went nuts with the last loaner i had; the manual mode is really fun on the freeway and you can hear the small shift burp as well.
yeah my loaner 2015 CLA250 has the same engine, is heavier with 4 doors, but is way faster than my C250 coupe. resetting throttle position should fix this I'm hoping
What are the other differences between the CLA250 and C250 Engine Setup?
Last edited by fl0wmastr; Dec 30, 2015 at 11:13 AM.
yeah my loaner 2015 CLA250 has the same engine, is heavier with 4 doors, but is way faster than my C250 coupe. resetting throttle position should fix this I'm hoping
What are the other differences between the CLA250 and C250 Engine Setup?
The CLA is a 2.0T and the C250 is a 1.8T.
I got a CLA for a loaner last week, and while it was quick, the overall feel of the car felt cheaper than my C250. That's my opinion at least.
I got a CLA for a loaner last week, and while it was quick, the overall feel of the car felt cheaper than my C250. That's my opinion at least.
My CPO C250 coupe is (per mfr's 7.1 0 - 60) not so much quick as insistent.
Purchase was replacement for a 6M Asian coupe QM time 14.5. The looks, fuel economy - not to mention the 2/3 MSRP cost - are big positives to this sailor.
I don't notice any turbo lag on any of the modern turbos (including ours). Nothing compared to old Saabs anyway....
Too funny but only because I owned an '85 & '88 900 Turbo. You could use a wrist watch to see how long the lag was. Yes in Eco there is some lag, but nothing like the Saabs I owned. On the other hand it was kind of fun with passengers that had never ridden in my car. They wouldn't know that I'd tromped on the accelerator, but then WHAM! the turbo would kick in.
I got a CLA for a loaner last week, and while it was quick, the overall feel of the car felt cheaper than my C250. That's my opinion at least.
That's pretty much inline with what I've heard here and other places. The regular CLA has real fit, finish, and NVH issues whereas the AMG version is fully sorted. It's one of those MB's that you get every penny's worth spent on the CLA45 over the non-AMG.
The CLA45 is on my short list of cars I'd replace my C250 with.
I think there may be some confusion in this thread between what is the turbo lag and what is just the transmission.
There is a thread on benzworld about a TCU flash available for the car that supposedly transforms the C250's driveability by increasing low end torque and improving shifting points. Supposedly the factory sets the torque limiter to 85% in the transmission.
I got a CLA for a loaner last week, and while it was quick, the overall feel of the car felt cheaper than my C250. That's my opinion at least.
I have a GLA250 now as a loaner. I have mixed feelings about it. Some of the interior materials are nicer but the interior design is a bit funkier. I just can't take the iPad look going in many of the newer models.
That and it's too big to be a car and too small to be an SUV. It just doesn't make much sense to me. It's like the revers of a Tardis, it looks bigger on the outside than it is on the inside.
But that dual clutch transmission sure is nice! Also, the TCU knowns what to do. I'm not sure why the C-Class needs such an unpredictable and wonky transmission/throttle response.
What I'll really miss is the manual mode shifting paired with the dual clutch. It works much more beautifully than I expected. :'(
Last edited by michail71; Jan 11, 2016 at 09:45 PM.
It's a complete drop in replacement TCU built by a guy here in the UK, it's a major evolution of the standard MB part and is a drop in replacement for EGS, EGS51, EGS52 or EGS53 TCU's. It has huge amount of control not possible with the stock unit including the shift pressure, so the shifts can be brutal fast or silky smooth... https://docs.ultimate-nag52.net/en/g...ation/settings
2015 SL400 (M276 Turbo), 2014 C350 Sport (M276 NA), 2004 SL500 (M113), 2004 Audi TT225 (BEA)
Really late to this 10-year old thread and I haven't read through it all, but I will suggest if you are unhappy with the transmission or general responsiveness of your car to seriously consider @BenzNinja to perform his transmission upgrade that adds Agility/Sport+, last mode remembered, and some tweaking of the throttle response. I've had the programming done on both my car and it made a huge difference in overall performance and well worth it.
I kinda disagree with the description because I found Agility to be more aggressive (sporty), yet very drivable in traffic, than Sport mode, rather than something between E/C and Sport.
Last edited by JettaRed; Jan 29, 2024 at 10:06 AM.
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Slideshow: A one-of-one U.S.-spec Mercedes-Benz SLR McLaren Roadster became even rarer after a factory-backed transformation at McLaren's headquarters.
