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Mercedes GLC / GLC Coupé 300 (2.0T) EQ Boost

Name: Mercedes GLC / GLC Coupé 300 (2.0T) EQ Boost chip tuning
Brand: Mercedes
Price: 140.00 EUR
Availability: InStock

2019–2023 · 258 hp

Stage 1

E85

E85 + Stage 1

	Original	After tuning	Diff
Power hp	258	280	+22
Torque Nm	370	420	+50

Power gain

+9%

Torque gain

+14%

Ready to feel these +22 hp on the road?

Get your ready-to-flash Stage 1 file for the Mercedes GLC / GLC Coupé

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	258	270	+12
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 €1 736 a year at the pump

Get your E85 adaptation file for the Mercedes GLC / GLC Coupé

Order tuning file →

File from €100

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

Fuel cost — E85 vs petrol −45%

Petrol · 100 km

~~12.0 L~~ · €25.54

E85 · 100 km

15.4 L · €13.97

You save ≈ €11.57 every 100 km — about €1 736 a year (over 15 000 km)

E85 uses ≈ +28% more litres, but the pump price (€0.909/L vs €2.121/L, France average on October 30, 2026) more than makes up for it.

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

	Original	After E85 + Stage 1	Diff
Power hp	258	305	+47
Torque Nm	370	460	+90

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.

+47 hp and €1 736/year saved — both

Get your E85 + Stage 1 file for the Mercedes GLC / GLC Coupé

Order tuning file →

File from €100

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

Fuel cost — E85 vs petrol −45%

Petrol · 100 km

~~12.0 L~~ · €25.54

E85 · 100 km

15.4 L · €13.97

You save ≈ €11.57 every 100 km — about €1 736 a year (over 15 000 km)

E85 uses ≈ +28% more litres, but the pump price (€0.909/L vs €2.121/L, France average on October 30, 2026) more than makes up for it.

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

Original ECU files for Mercedes 9 254 stock (ORI) files · €20 per file →