• K&N 33-2474 Performance Air Filters Pair for Mercedes M278 4.7L V8 – E550 CLS550 S550 GL550 – Drop-in high flow replacement filters
  • K&N 33-2474 air filter set in original red packaging – Genuine K&N Million Mile Warranty filters for Mercedes-Benz M278 engines
  • Angled view of K&N 33-2474 red pleated high-flow air filters – Pair for Mercedes M278 E550 CLS550 S550 – Washable & reusable
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BenzUnited Parts

K&N Performance Air Filter Set for Mercedes E550 / CLS550 / S550 (4.7L V8 Bi-Turbo)

K&N Performance Air Filter Set for Mercedes E550 / CLS550 / S550 (4.7L V8 Bi-Turbo)

$150.00 USD
$150.00 USD
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Shipping calculated at checkout.

K&N Performance Air Filters – Pair (Mfg Part # 33-2474)

The legendary red K&N drop-in filters trusted by tuned M278 owners for over a decade — instant throttle sharpness and proven horsepower gains with zero hassle.

Why K&N Performance Filters Are Perfect for Your M278

✅ Boosts Horsepower & Acceleration
High-flow oiled cotton media delivers measurable gains in throttle response and mid-range power.
✅ Washable & Reusable
Clean and re-oil every 50,000 miles — backed by K&N’s famous Million Mile Limited Warranty®.
✅ 100% OEM Drop-In Fit
Perfect factory seal, works with stock MAF & electronics, CARB legal in all 50 states, will NOT void your warranty.

Real-World Results Owners Report

  • Noticeably crisper throttle and stronger mid-range pull
  • Better power delivery on hot days and repeated runs
  • Perfect match for headers, downpipes, tune, E85 or spacers
  • Zero check-engine lights • No tuning required

“Put the K&N pair in my E550 last week — throttle is way sharper and it pulls harder through the gears. Exactly what I expected from K&N.” – Alex R., 2015 CLS550 • 512 whp

What You Get (Sold as Pair)

  • ✔ 2 × K&N High-Flow Performance Air Filters (Left + Right) – Part # 33-2474
  • ✔ Pre-oiled and ready to install
  • ✔ Installation instructions

Fits These M278 4.7L BiTurbo V8 Models

Model Chassis Years
E 550 • CLS 550 W212 / C218 2012–2016
S 550 / S 560 • CL 550 W221 • W222 • C216 • C217 • A217 2011–2017
SL 550 R231 2013–2020
GL / GLS 450 • 550 • ML / GLE 550 X166 • W166 2012–2019

OE Cross Reference: 2780940004 • 278094000495 • 278094000490 • Always confirm M278 engine code

Drop-in install in under 5 minutes • No tools needed • Fully reversible

🔥 Add Pair to Cart – Ships Same Day

BenzUnited Parts • Mercedes Performance Specialist • Burbank, CA

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