2020–2024 Mercedes-Benz GLB
By Tom Becker ✓ Certified Mechanic · Published Sep 21, 2026 · Updated Oct 22, 2026
Save $75 by doing it yourself! Shop cost: $110
Quick answer: Engine Air Filter Replacement on a 2020–2024 Mercedes-Benz GLB is rated Easy and takes about 20–30 minutes. You'll need 2 tools for this job, and parts cost about $35. This guide walks you through the full job step by step, including the mistakes to avoid.
| Part Name | Part Number | Price | Buy |
|---|---|---|---|
| Engine air filter for 2020-2024 Mercedes-Benz GLB; verify engine, housing shape, and VIN fitment | — | $35.00 |
About prices: shown prices are typical retail averages and change frequently; cheaper alternatives may be available. Confirm the current price before buying.
💡 Pro tip: Order all parts at once to save on shipping
Follow these steps carefully
Park on level ground, switch the ignition fully off, and open the hood. Don't unplug anything yet — just look at how the two retaining tabs hold the module in its cradle.
I never learn this the expensive way: Don't unplug anything yet — just look at how the two retaining tabs hold the module in its cradle.
Flip open the two tabs and unlock the ECM from its cradle, then carefully lay the module to the side on a fender cover. Note: dealers do exactly this rather than disconnecting it.
With the ECM out of the way, undo the fasteners around the airbox lid and lift the lid off. Lift the old filter element out of the lower housing and note its orientation for the new one.
Vacuum the lower housing and wipe the lid's underside. Inspect the lid's sealing gasket for cracks or deformation — a flattened gasket lets dusty air bypass the filter, and this seal is the difference between a quiet box and a whistling one. Check that nothing fell into the intake opening while the lid was off.
Quick word from me — I've been under there: Inspect the lid's sealing gasket for cracks or deformation — a flattened gasket lets dusty air bypass the filter, and this seal is the difference between a quiet box and a whistling one.
Set the new filter into the lower housing exactly the way the old one sat. Press the edges down so the seal contacts the housing evenly all the way around. It should sit flat with no rocking or lifted corners.
Set the ECM back into its cradle and lock the two tabs. Refit the lid and tighten its fasteners evenly. A loose ECM means a no-start or a dashboard full of warning lights.
I've seen this exact mistake come through the shop: A loose ECM means a no-start or a dashboard full of warning lights.
Start the engine. It should fire normally and idle smoothly with no warning lights. Listen at the airbox for any whistle that would indicate a lid leak.
Test your repair before closing everything up. If something doesn't work right, double-check your steps.
⚠️ Common Mistakes to Avoid
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