Mercedes CLA45 AMG Performance Parts & Tuning Mods

Top Brands For Mercedes CLA45 AMG

The Mercedes CLA45 AMG is backed by a strong range of aftermarket brands, offering everything from intake and exhaust upgrades to suspension, braking and styling mods. Below you will find leading manufacturers known for high quality performance parts tailored to this AMG platform.

Exterior Styling Upgrades For Mercedes CLA45 AMG

Give your Mercedes CLA45 AMG a sharper, more individual look with our exterior styling upgrades. From body kits, splitters, diffusers and spoilers to custom grilles and other visual mods, you can dial up the aggression, tidy up the aero details and make your CLA45 stand out from the crowd.

Handling & Suspension Upgrades

The Mercedes CLA45 AMG is quick out of the box, but it can feel a bit nose heavy and understeery when you really push on. The first step is always tyres and brakes: a quality set of UHP or track-focused tyres transforms grip and feedback, while performance brake pads, braided lines and high boiling point fluid give more consistent stopping power on fast road or track. If you are running more power, a properly sized big brake kit adds better heat control and pedal feel without silly claims. Once the basics are sorted, look at suspension tuning with lowering springs or a well matched coilover kit to reduce roll and tighten body control. Adjustable dampers let you dial in comfort for daily use then add stiffness for trackdays. Uprated anti roll bars, strut braces and firmer bushings help the CLA45 rotate more cleanly, cutting that factory understeer and improving agility in tight bends. Taken in stages, these handling mods make the car feel more precise, stable and confidence inspiring without ruining its everyday usability.

Frequently Asked Questions

What are the best first performance mods for a Mercedes CLA45 AMG?

The most popular starting point for a CLA45 AMG is a quality ECU remap or tuning box, paired with a high flow panel filter or intake kit. This combination unlocks noticeable gains in horsepower and torque without changing the character of the car too much.

After that, a sports exhaust or turbo-back system is a great upgrade. It helps the turbo breathe, sharpens throttle response and gives the CLA45 a more aggressive AMG soundtrack, all while supporting future tuning stages.

How much power can the stock CLA45 AMG engine handle safely with bolt-on mods and a remap?

The M133 engine in the CLA45 AMG is strong, and with sensible tuning it can handle a solid bump in power. A staged remap with supporting mods like an upgraded intercooler, intake, downpipe and exhaust can safely deliver a noticeable increase over stock for fast-road use.

The key is to use proven software and quality hardware, keep on top of servicing and run decent fuel. If you are chasing bigger turbo upgrades or track-only power levels, it is worth budgeting for extra cooling and more frequent maintenance to keep reliability in check.

Will tuning my Mercedes CLA45 AMG affect reliability and daily drivability?

Done properly, with a conservative ECU tune and matched supporting parts, most CLA45 AMGs remain perfectly usable as daily drivers. A good remap will focus on smooth torque delivery, sensible boost levels and safe air fuel ratios rather than chasing headline dyno numbers.

To protect reliability, look after the basics. Use quality oil, change it regularly, let the engine warm up before pushing on and allow a short cool down after spirited driving. Also be honest about how you use the car, a daily with occasional spirited blasts wants a different approach to a dedicated track toy.

What wheel and tyre sizes work best on a tuned CLA45 AMG?

Most owners stick with 18 or 19 inch wheels, as they offer a good balance of grip, comfort and steering feel. A modestly wider rim and tyre setup can improve traction on a tuned CLA45 AMG, but you need to keep offsets sensible to avoid rubbing and upsetting the 4MATIC system.

Lightweight alloys are a smart upgrade, they reduce unsprung weight and help the chassis feel more responsive. If you are unsure on width and offset, ask before you buy, we can advise on proven fitments that clear the brakes and arches without drama.

What supporting mods should I consider before increasing boost or fitting a bigger turbo?

Before you think about a larger turbo or aggressive boost levels, you want the basics sorted. An uprated front mount intercooler, high flow downpipe, free flowing exhaust and a decent intake system should come first on a tuned CLA45 AMG.

It is also worth looking at upgraded spark plugs, fresh ignition components and, if you plan regular track days, improved cooling and higher spec brake pads and fluid. These supporting upgrades help the car cope with the extra stress and keep performance consistent.

How much does it typically cost to tune a Mercedes CLA45 AMG?

Costs vary depending on how far you want to go. A simple stage 1 remap with no hardware can be relatively affordable and gives a very noticeable performance boost for the money.

Once you factor in hardware like a performance exhaust, downpipe, intercooler, intake and suspension upgrades, you are looking at a bigger investment, but the car feels transformed as a complete package. We can tailor a parts list to your budget, whether you want a quick road car or a track focused build.

Is the stock braking and suspension setup enough for a tuned CLA45 AMG?

For light tuning and normal fast-road use, the stock AMG brakes and suspension are decent, especially with good quality performance brake pads and tyres. That said, power upgrades often highlight the limits of the standard setup when you really lean on the car.

If you plan spirited B-road driving or the odd track day, consider uprated pads, braided brake lines and high temp fluid as a minimum. A set of quality lowering springs or coilovers can also sharpen handling and help you make the most of the extra power while keeping the CLA45 AMG composed and predictable.

Final Thoughts On The Mercedes CLA45 AMG

The Mercedes CLA45 AMG is already a seriously capable bit of kit from the factory, with punchy turbo power, 4MATIC traction and a cabin that makes daily driving feel special. Its character is all about fast road pace and real world point to point speed, but like most performance cars it leaves a bit of potential on the table. Well chosen tuning parts, from intake and exhaust upgrades to a proper ECU calibration, can unlock smoother power delivery and a healthier mid range without wrecking drivability. Add in better cooling hardware and you also help the car keep its performance repeatable on spirited drives or track days. Where the stock CLA45 AMG can feel a touch firm yet still slightly underdamped, handling mods really bring the chassis together. Quality lowering springs or coilovers, uprated anti roll bars and proper alignment settings sharpen turn in and reduce that factory understeer. Many owners also find that upgraded brake pads, lines and fluid give far more confidence when pushing on, especially in heavier use. With the right wheels and tyres the car puts its torque down more cleanly, transforms steering feel and tidies up the stance at the same time. There are some known weak spots that enthusiasts commonly address, such as intake temps on hard runs, gearbox behaviour when tuned and the limits of the stock exhaust for flow and sound. Sensible, proven upgrades keep reliability and everyday comfort intact, so you can enjoy your CLA45 AMG on the school run and still have something genuinely fun for weekend blasts. Blend performance parts, chassis tweaks and a few styling touches and you end up with a very personal package that feels a step on from standard in every way that matters. Build it around how you actually drive, and you will have a CLA45 AMG that feels properly sorted and uniquely yours.