JB4 Tuner for CLA250 & GLA250 • +60-85whp 2.0T Power Upgrade (2014–2019)

Want more power from your CLA250 or GLA250 without losing daily drivability? The JB4 is the easiest and most effective plug-and-play tuner for the Mercedes 2.0T engine — delivering big gains safely while keeping the car fully reversible.

Real Gains on CLA250 & GLA250

• +60–85 wheel horsepower on 91–93 octane
• Stronger mid-range pull and quicker 0-60 times
• Sharpened throttle response with less lag
• E85 maps available for even more power

✓ True plug & play • Reversible • Made in USA • 5-Year Warranty

Compatible Models

Build Your Package – Add These Popular Upgrades

Use the options above to bundle any of these with your JB4:

Catless Downpipe
Removes restriction for faster spool and extra power. Louder turbo sound.

aFe Pro DRY S High-Flow Air Filter
Better airflow and throttle response. Easy drop-in upgrade.

Wagner Tuning EVO1 Competition Intercooler
110% more volume for lower intake temps and consistent power under sustained boost.

Perfect for 2014–2019 CLA250 and GLA250 owners looking for reliable power, better throttle, and easy installation. Works with stock or modified 2.0T engines.