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Mercedes SLK SLK 350

Name: Mercedes SLK SLK 350 chip tuning
Brand: Mercedes
Price: 95.00 EUR
Availability: InStock

R171 (2004–2010) · 272 hp

Stage 1

E85

E85 + Stage 1

	Original	After tuning	Diff
Power hp	272	290	+18
Torque Nm	350	375	+25

Power gain

+7%

Torque gain

+7%

Ready to feel these +18 hp on the road?

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

Order tuning file →

Stage 1 file: €95

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

Power graph / Stage 1

PowerTorqueStock

	Original	After E85	Diff
Power hp	272	285	+13
Torque Nm	350	365	+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 €1 848 a year at the pump

Get your E85 adaptation file for the Mercedes SLK

Order tuning file →

File from €100

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

Fuel cost — E85 vs petrol −46%

Petrol · 100 km

~~12.7 L~~ · €26.95

E85 · 100 km

16.1 L · €14.63

You save ≈ €12.32 every 100 km — about €1 848 a year (over 15 000 km)

E85 uses ≈ +27% more litres, but the pump price (€0.909/L vs €2.123/L, France average on October 29, 2026) more than makes up for it.

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

	Original	After E85 + Stage 1	Diff
Power hp	272	315	+43
Torque Nm	350	410	+60

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.

+43 hp and €1 848/year saved — both

Get your E85 + Stage 1 file for the Mercedes SLK

Order tuning file →

File from €100

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

Fuel cost — E85 vs petrol −46%

Petrol · 100 km

~~12.7 L~~ · €26.95

E85 · 100 km

16.1 L · €14.63

You save ≈ €12.32 every 100 km — about €1 848 a year (over 15 000 km)

E85 uses ≈ +27% more litres, but the pump price (€0.909/L vs €2.123/L, France average on October 29, 2026) more than makes up for it.

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

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