BenzUnited Parts
aFe Pro DRY S 31-10240 High-Flow Air Filter – Mercedes M270 2.0L | CLA250, GLA250 (Single Filter)
aFe Pro DRY S 31-10240 High-Flow Air Filter – Mercedes M270 2.0L | CLA250, GLA250 (Single Filter)
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The aFe Pro DRY S 31-10240 is a high-flow, washable panel air filter for the Mercedes M270 2.0L Turbo — CLA250 and GLA250. This listing includes one filter, because these cars use a single filter housing. Synthetic, oil-free media, made in the United States, drops straight into the factory housing in about ten minutes with no tuning and no modification.
What You Get
| Part Number | aFe 31-10240 |
| Quantity Included | 1 filter — one complete vehicle set |
| Filter Media | Synthetic, oil-free |
| Tune Required | No |
| Install | Drop-in, 5–10 minutes, Torx driver required |
| Reusable | Yes — washable, no oil required |
| Made In | United States |
| Ships | Within 2 business days |
Cold Air Intakes Aren't Pulling Cold Air
Ironically, "cold air intakes" use open cone filters, exposing them to hot air from the engine bay. When IATs rise, the ECU then pulls timing, reducing power when you are driving hard or doing repeated pulls.
The factory Mercedes airbox already channels cold air from the outside. Sealed, ducted to the grille. The paper panel inside is the only real restriction, and that is what this performance air filter replaces.
Fitment — M270 2.0L Turbo
| Model | Chassis | Years |
|---|---|---|
| CLA250 | C117 / X117 | 2014–2019 |
| GLA250 | X156 | 2015–2019 |
Install & Maintenance
Undo the Torx screws on the airbox lid, lift the lid, swap the filter, and put it all back together. No cutting, no wiring, no tuning.
No oil, ever. Wash with filter cleaner and water, rinsing from the clean side outward, air dry at room temperature, and reinstall. Nothing to re-oil means nothing to over-oil, so the MAF question never comes up.
Warranty, Shipping & Returns
- Warranty: aFe Power Limited Lifetime Warranty against manufacturer defects.
- Shipping: Ships within 2 business days.
- Returns: 30-day returns on unused items in original packaging.
Questions
How many filters does my car need?
One. The M270 uses a single filter housing, and that is exactly what this listing includes.
Do I need a tune to run this?
No. This is a direct replacement for the factory panel and works on a completely stock car. A tune is where the real power is, but it is not a requirement for fitting this.
Will this contaminate my MAF sensor?
No. Dry media uses no oil at all, so there is nothing to migrate downstream. This is the filter to buy if MAF contamination is the thing keeping you off a washable filter.
Is a cold air intake better than this?
On the M270, no. The factory box is already sealed and ducted to outside air, so the paper panel is the restriction rather than the box. An open cone gains a little peak flow and gives up intake temperature, which is the wrong trade on a turbocharged engine. A full intake kit earns its place once you are chasing airflow beyond what the factory box supports.
How often does it need cleaning?
aFe publishes a cleaning interval of roughly every 20,000 to 30,000 miles, sooner if you have been through extremely dusty or dirty conditions.
Does this fit the factory airbox without modification?
Yes. It is an OEM-shape panel filter. Nothing is cut, drilled, relocated or removed, and the factory heat shielding stays exactly as it is.
