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Stage 1 on a 381PS A45 (W176, 2015 to 2018) is worth around 420PS and 550Nm on our rolling road. The later W177 A45, which uses the M139 engine at 387PS, goes to about 470PS and 620Nm, and the 421PS A45 S reaches the same. The CLA45 and GLA45 share the engine and tune to the same figures in their own bodies. All of it is software only, and every car is proven on the dyno here in Maidstone before it leaves.
MERCEDES A45, CLA45, GLA45 AMG TUNING
(2018 - Present)
The Mercedes A45 CLA45 GLA45 AMG has garnered numerous positive reviews since their releases. However, one common critique is that it lacks some of the ‘fun’ factor found in its rivals. We’re here to change that.
Mercedes A45, CLA45, GLA45 AMG Stock Results
The Mercedes A45, CLA45, and GLA45 AMG models deliver impressive performance straight from the factory that we at JFA take the challenge on of improving. These high-performance vehicles are powered by a 2.0 litre turbocharged engine that accelerate from 0 to 60 mph in just around 4 seconds. Each model is equipped with AMG’s advanced 4MATIC all wheel drive system, ensuring excellent traction and handling even at high speeds. The A45 offers a compact yet sporty experience, the CLA45 combines performance with a sleek coupe design, and the GLA45 brings similar power in a more versatile, SUV-style.
SELECT A STAGE...
Mercedes A45, CLA45, GLA45 AMG Engine Tuning Options
Our Recommended
JFA Stage 1 Tune for Mercedes A45, CLA45, GLA45 AMG: Gaining Power and Torque Efficiently
Our JFA Stage 1 Tune boosts the Mercedes A45, CLA45, GLA45 AMG’s torque and BHP by safety adjusting various parameters that control how the engine operates such as, Fuel Maps, Ignition Timing, Boost Control, Throttle Response, Rev Limiter, Variable Valve Timing, and many more!
At our Tuning Facility in Kent we have our 2000 BHP Mustang 4WD Linked Dyno, where we rigorously test our tunes to ensure the best result for our customers. We ensure our tune is bespoke to each Mercedes through writing our own files in house, whilst also having the ability to return the vehicle back to stock at anytime, incase of vehicle resale.
We give a 30 day money back guarantee, whilst also offering a lifetime support to ensure our customers confidence in us. Engine safety is our main priority!
Alternatives
Enhance The Mercedes A45, CLA45, GLA45 AMG with the JFA Speed Buster Module
The JFA Speed-Buster Tuning Module will enhance the driving experience of the Mercedes A45, CLA45 and GLA45 AMG by safely boosting its performance. It guarantees a gain in BHP and Torque whilst maintaining reliability. Each JFA Speedbuster tuning module is custom made for the Mercedes A45, CLA45 and GLA45 AMG.
The Plug & Play system is easy to install and will only take a few minutes, but if you’d like expert installation this is available at our UK-based facility in Kent!
Additionally, our JFA Speed-Buster has a 12 Month Warranty just to ensure our customers have that extra security, when making a purchase with us.
Mercedes A45, CLA, GLA45 AMG Stage 1 Tuning Results
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- Mercedes A45 CLA45 GLA45 AMG
Please note this dyno graph shows raw data measured at the wheels. Our system then calculates drivetrain losses to produce engine power figures.
With this upgrade, customers can expect a power increase from the standard 360 BHP to an impressive 470 BHP, along with a torque increase to 620 Nm.
This upgrade is compatible with both the original and later models of the A45, as well as the GLA45 and CLA45. Experience a noticeable enhancement in performance and driving excitement with our Stage 1 upgrade.
Tuning Options
Questions we get asked
How much power does an A45 AMG make at Stage 1?
The 381PS W176 car goes to around 420PS and 550Nm. The 387PS W177, which uses the newer M139 engine, goes to around 470PS and 620Nm, and so does the 421PS A45 S. The older 360PS W176 reaches about 400PS and 550Nm.
Do the CLA45 and GLA45 make the same as the A45?
Yes. They are the same engine in different bodies at the same state of tune, so they tune to the same figures. The only real differences are weight and gearing, which change how it feels rather than what it makes.
What is the difference between the M133 and M139 engines?
The M133 is the earlier 2.0 turbo in the W176 A45 up to 381PS. The M139 replaced it in the W177 from 2018: the engine is turned around, the turbo is a twin-scroll roller-bearing unit and it runs a much higher injection pressure. The M139 has more headroom and that is why the later cars gain more.
Do I need the gearbox tuned as well?
Not for Stage 1. These cars use a dual-clutch gearbox with its own torque limiter. If you are going beyond Stage 1, the gearbox software raises the limiter, sharpens the shifts and stops it changing up on its own in manual mode.
Is it road legal and will it pass an MOT?
Stage 1 changes no hardware. The catalyst and every emissions component stay exactly as they are, so the car remains road legal and MOT-ready, and we keep your original file so it can be returned to standard.
Will a remap affect my Mercedes warranty?
A main dealer can detect a remap and may decline an engine or drivetrain claim as a result. We hold your original file and can put the car back to standard before a dealer visit, and we offer an optional engine warranty on Stage 1.
Do you offer a 12 month warranty?
Yes. Warranty plans are available to buy separately: see our warranty page. Every remap also comes with lifetime software support.
What is motorsport use?
Motorsport-exclusive components are explicitly designed for track use. While they can be installed on any vehicle, it’s important to note that using such parts renders the vehicle unsuitable for road use and may result in MOT failure.
Will the lifespan of my engine be reduced?
No! Our remaps are designed specifically to improve the performance of your vehicle whilst remaining within the tolerances of your vehicles’ components.
Sadly, in attempt to achieve ‘big numbers’ some other companies over tune engines, placing excessive stress on the engine, transmission, cooling systems, etc, leading to reduced life span and reliability of the vehicle. We pride ourselves in producing reliable remaps which do not over stress your vehicle but still produce impressive results.
What is covered with the 30-day money back guarantee?
In any case where a customer is dissatisfied with any remap software covered by the guarantee, within thirty days of the supply date, the customer can request their money back. In order for any refund to be processed, the customer must present their vehicle to our workshop and allow our technicians to restore the vehicle to its original state. On successful completion JF Automotive will refund the cost of the remap to the customer.
No refund can be granted unless the vehicle is returned to the original state by JF Automotive. The 30-day money back guarantee covers Stage 1 remaps, EGR, DPF and AdBlue software deletes, gearbox tuning (not BMW xHP) and economy remaps. It does not cover Stage 2, Stage 3, pops and bangs, xHP gearbox tuning, parts (including plug-in modules such as the Speed-Buster) or dyno sessions.
If another modification is purchased alongside a tuning file, which relies on a remap to operate, only the cost of the file is covered by this guarantee. We reserve the right to withdraw this 30 day money back guarantee.
Can the remap be reversed?
Absolutely. We offer this service free of charge if the vehicle is brought back to us. We’ll be very surprised if that’s what you want after taking one of our remap products, however in the case of lease cars some customers prefer to put the car back to standard before returning the car. You might want it back to standard if you are visiting a dealer for warranty or service work, again we will do this for free. Should you lose your tuning files due to dealer actions or parts failure we will be happy to re-install the map onto your car free of charge where possible.
What if a main dealer wipes the map with a software update?
No problem, simply bring the vehicle back in and we will take a fresh read of your ECU and write you a new map file free of charge. We offer this as part of our lifetime software support.
Do I need to notify my insurance company?
Whilst the remap is undetectable to dealer equipment, you should notify your insurance company of any modification to your vehicle. Many insurance companies do not penalise you for upgrades of this nature, particularly if you’re tuning for increased economy however a failure to disclose modifications may invalidate your policy. You may wish to enquire with your insurer if the modification will affect your policy prior to choosing one of our services.
Why we don't you offer ECU remapping for £200?!
We get asked, “Why do some tuners charge as little as £150?” There are a few factors as to why we do not offer remapping for £100-£200!
We supply custom written files for each vehicle that we remap that take in to account condition, milage and customer request of each vehicle. Our services are fully insured with a 30-day money back guarantee and lifetime support for the tuning software supplied. We constantly invest in the most up to date tuning and diagnostic equipment and software and we offer a quality service to all our customers.
Overall our custom supplied tuning software is of the highest standard that we know of, so if you want the best of the best, choose JF Automotive.
