Catalog/ Cars/ Mercedes/ C

Mercedes C 300 (US)

Name: Mercedes C 300 (US) chip tuning
Brand: Mercedes
Price: 140.00 EUR
Availability: InStock

W205 (04/2014–2018) · 241 hp

Stage 1

E85

E85 + Stage 1

	Original	After tuning	Diff
Power hp	241	250	+9
Torque Nm	370	400	+30

Power gain

+4%

Torque gain

+8%

Ready to feel these +9 hp on the road?

Get your ready-to-flash Stage 1 file for the Mercedes C

Order tuning file →

Stage 1 file: €140

✓ Original file back-up ✓ Delivered in ~30 min ✓ Support included

Power graph / Stage 1

PowerTorqueStock

	Original	After E85	Diff
Power hp	241	250	+9
Torque Nm	370	385	+15

E85 adaptation (no Stage 1)

Just the fuel switch: the ECU is adapted to run Superéthanol E85 (up to 85% bio-ethanol) with no Stage 1 chip on top. You get a small power bump from ethanol's higher octane (~104 RON) and a much cheaper fill-up. Flex Fuel file: the car still runs on regular petrol whenever you want.

Save €1 680 a year at the pump

Get your E85 adaptation file for the Mercedes C

Order tuning file →

File from €100

✓ Original file back-up ✓ Delivered in ~30 min ✓ Support included

Fuel cost — E85 vs petrol −47%

Petrol · 100 km

~~11.2 L~~ · €23.8

E85 · 100 km

13.9 L · €12.6

You save ≈ €11.2 every 100 km — about €1 680 a year (over 15 000 km)

E85 uses ≈ +23% more litres, but the pump price (€0.909/L vs €2.116/L, France average on October 30, 2026) more than makes up for it.

🇫🇷 Version française : conversion éthanol E85 de la Mercedes C, calculateur d'économies par département →

	Original	After E85 + Stage 1	Diff
Power hp	241	270	+29
Torque Nm	370	425	+55

E85 + Stage 1 remap

Chip tuning re-optimised for Superéthanol E85: the ignition and boost maps are calibrated to make full use of ethanol's higher octane (~104 RON). Bigger power and torque gains than either Stage 1 on petrol or E85 adaptation alone, plus the same cheap fill-up.

+29 hp and €1 680/year saved — both

Get your E85 + Stage 1 file for the Mercedes C

Order tuning file →

File from €100

✓ Original file back-up ✓ Delivered in ~30 min ✓ Support included

Fuel cost — E85 vs petrol −47%

Petrol · 100 km

~~11.2 L~~ · €23.8

E85 · 100 km

13.9 L · €12.6

You save ≈ €11.2 every 100 km — about €1 680 a year (over 15 000 km)

E85 uses ≈ +23% more litres, but the pump price (€0.909/L vs €2.116/L, France average on October 30, 2026) more than makes up for it.

🇫🇷 Version française : conversion éthanol E85 de la Mercedes C, calculateur d'économies par département →

Original ECU files for Mercedes C Stock (ORI) files of this model · €20 per file →