Engine code M278
Mercedes-Benz M278 4.7L V8 BiTurbo
The M278 is the 4.7L twin-turbo V8 in the E550 and E500 (212), CLS550 (218), S550 and S500, ML500, GL550, GLE550 and SL550. BlackBoost makes cold air intakes, catless downpipes, wide open thermostats and OEM replacement ducts for it.
- Displacement
- 4.7L (4,663 cc)
- Layout
- V8
- Aspiration
- Twin-turbo
- BlackBoost parts
- 50
Vehicles with the M278
- E500 / E550 (212)
- CLS500 / CLS550 (218)
- S500 / S550 (222 / 217 / 221)
- CL500 (216)
- SL500 / SL550 (231)
- ML500 (166)
- GL550 (166)
- GLE500 / GLE550 (166 / 292)
- GLS550 (166)
M278 upgrades for the E550, CLS550 and S550
Frequently asked questions
Do you make parts for the E550 with the M278?
Yes. For the E550 and E500 (212) we make a Gen-2 cold air intake, a wide open thermostat and an OEM replacement duct.
Is the M278 a 4.6L or a 4.7L engine?
Its displacement is 4,663 cc, and it is commonly called the 4.7L V8. Depending on the market, cars with the M278 are badged 500 or 550, for example the E500 and E550.
Do you make M278 downpipes?
Yes, for the ML500 (166) and the GLE500 and GLE550 (166 and 292). Catless downpipes need a tune to remove the check engine light and are for race use only.
Which cars use the M278 engine?
In our range: E500 and E550 (212), CLS500 and CLS550 (218), S500 and S550 (222, 217 and 221), CL500 (216), SL500 and SL550 (231), ML500, GL550 and GLS550 (166), and GLE500 and GLE550 (166 and 292).
Do M278 upgrades need a tune?
Cold air intakes are plug and play and need no tune. Wide open thermostats need no tune either, but should be installed by an experienced mechanic. Catless downpipes need a tune to remove the check engine light.
Can I get BlackBoost parts installed in the UAE?
Yes. We install at our Ajman HQ and our Abu Dhabi branch, and our products can also be fitted at our partner workshops. Call +971 6 740 1535 or email info@black-boost.com to book.
Do you ship engine parts worldwide?
We ship worldwide from our UAE headquarters in Ajman by DHL or FedEx, with a signature on delivery. In-stock orders are usually dispatched within 24 hours, and made-to-order items can take 4 to 8 weeks. Customers in the USA, Europe and Australia can order through our official USA, EU and Australia stores.





































