Legend Tuned · Chip Tuning
Mercedes-Benz C-Serisi (W205) C 300 258 HP Chip Tuning
- 2014–2021
- Petrol
- 258 HP · 370 Nm
- ECU: Bosch MED17.7.7
Target with Legend Tuned Stage 1: 275 HP / 450 Nm; with Stage 2: 300 HP / 485 Nm. The original software is backed up, the calibration is tailored to the car, and the result is verified by datalog.
Legend Tuned figures
Figures are examples/estimates and may vary with the car's mileage, maintenance condition, fuel quality and hardware. Exact results are determined by dyno/datalog.
Power & torque curve
Stock vs Stage comparison
A representative power and torque curve with a technical table of all figures. Hover over the chart to see values by rpm.
- Power · Stage 1
- Torque · Stage 1
- Power · Stock
- Torque · Stock
Technical figures
| Value | Stock | Stage 1 | Stage 2 |
|---|---|---|---|
| Power | 258 HP | 275 HP | 300 HP |
| Power (kW) | 190 kW | 202 kW | 221 kW |
| Torque | 370 Nm | 450 Nm | 485 Nm |
| Power gain | — | +17 HP (+7%) | +42 HP (+16%) |
| Torque gain | — | +80 Nm (+22%) | +115 Nm (+31%) |
Figures are examples/estimates and may vary with the car's mileage, maintenance condition, fuel quality and hardware. Exact results are determined by dyno/datalog.
Custom software · 12 options
Custom software options for this engine
Legend Tuned functions suitable for this engine, which can be applied in the same session as Stage software or on their own.
Emission Systems
Emission system solutions for track and motorsport projects.
- Catalytic Converter Delete (Cat Off) ECU software that prevents the check-engine light and power loss on cars with a removed or replaced catalytic converter.
- OPF/GPF Delete Software that disables the particulate filter (OPF/GPF) on petrol engines, intended for track and motorsport projects.
- Rear Lambda/O2 Sensor Delete Software that turns off monitoring of the post-cat (rear) oxygen sensor to prevent the check-engine light on downpipe and sports cat setups.
Legal notice: Software for emission systems (catalytic converter, DPF/FAP, OPF, EGR, AdBlue/SCR, etc.) is intended solely for track / motorsport and closed-course use. Driving vehicles with these systems disabled on public roads, and presenting them for TÜVTÜRK inspection, may be against regulations. On request, the original software can be restored.
Driving & Sound Effects
Make yourself heard and be first off the line.
- Pops & Bangs (Crackle Map) Popular The signature pops and crackles from the exhaust when you lift off the throttle — intensity set to your taste.
- Launch Control Popular A software feature that holds the revs steady for standing starts, giving the fastest, most repeatable launches.
- Speed Limiter Removal Popular Software that removes or re-sets the electronically limited factory top speed (Vmax).
- Rev Limiter Adjustment Software that re-sets the engine's maximum rev limit while staying within mechanical limits.
- Cold Start Idle Delete A software adjustment that reduces the high, noisy idle speed on a cold start.
Transmission (TCU) Software
Faster shifts, sharper response, proper torque management.
- Automatic Transmission Software (ZF / Aisin / 7G / 9G) Quicker, punchier shifting for torque-converter automatics such as ZF, Aisin, 7G-Tronic and 9G-Tronic.
- Torque Limiter Removal Software that rearranges factory torque restrictions based on gear, speed or transmission, within the limits of the drivetrain.
Fault & Function Solutions
Permanent software fixes for annoying faults.
- Fault Code Deactivation Software that permanently disables unnecessary fault codes in the ECU for systems that have been removed or are no longer used.
- Permanent Start-Stop Delete A solution that permanently disables the start-stop system that switches itself on at every start, or makes it remember your last setting.
Stage 2 hardware, peace of mind and process
Stage 2 requirements
Stage 2 ready with the Custom Sport Filter Kit
At Stage 2, the engine's breathing is freed up with hardware, and the software is written to match that hardware. The target for this engine is 300 HP / 485 Nm.
- Air intakeThe made-to-measure Legend Custom Sport Filter Kit or an intake suited to the car.
- Intercooler & boostA vehicle-specific intercooler / blow-off valve to keep temperatures stable under sustained load.
- Silicone boost hosesHoses and pipes that withstand the higher pressure.
- Health checkIgnition, fuel system and clutch checked for this power level; the job takes ~4–8 hours (depending on parts fitted).
Included every time
Power with peace of mind
- Original software backup — the factory software is read and archived before the job.
- Reversal — the car can be returned to its original software whenever you ask.
- Datalog check — boost pressure, ignition and air/fuel ratio are recorded and checked on a road test.
- Vehicle-specific calibration — not an off-the-shelf file; tuned to the engine, hardware and fuel quality.
- Pre-tune diagnostics — fault memory is read and engine health is checked before the software.
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Book
Tell us about your car and your goals; we'll plan the day and time together.
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Analysis & backup
Fault memory is read, the ECU is identified and the original software is archived.
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Legend Tuned software
Calibration tailored to the car (Stage 1: ~1–2 hours).
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Test & handover
Verified with a road test + datalog, then handed over with a walkthrough of what was done.
Mercedes-Benz C-Serisi (W205)
Other engines in the same generation
- Petrol C 160 129 → 175 HP +46
- Petrol C 180 1.5 156 → 175 HP +19
- Petrol C 180 1.6 156 → 175 HP +19
- Petrol C 200 1.5 EQ Boost 184 → 235 HP +51
- Petrol C 200 2.0 184 → 230 HP +46
- Petrol C 250 211 → 230 HP +19
- Petrol C 300 245 → 265 HP +20
- Petrol C 400 4MATIC 333 → 415 HP +82
- Petrol AMG C 43 4MATIC 367 → 420 HP +53
- Petrol AMG C 43 4MATIC 390 → 420 HP +30
- Petrol AMG C 63 476 → 545 HP +69
- Petrol AMG C 63 S 510 → 585 HP +75
- Diesel C 180 d 1.6 (OM626) 116 → 150 HP +34
- Diesel C 180 d 1.6 (OM654) 122 → 160 HP +38
- Diesel C 200 BlueTEC 136 → 175 HP +39
- Diesel C 200 d 1.6 (OM626) 136 → 175 HP +39
- Diesel C 200 d 1.6 (OM654) 160 → 180 HP +20
- Diesel C 220 BlueTEC / C 220 d (OM651) 170 → 215 HP +45
- Diesel C 220 d (OM654) 194 → 235 HP +41
- Diesel C 250 BlueTEC / C 250 d 204 → 250 HP +46
- Diesel C 300 d 245 → 300 HP +55
- Hybrid C 350 e 279 → 305 HP +26
- Hybrid C 300 de 306 → 335 HP +29
- Hybrid C 300 e 320 → 350 HP +30
Other C-Serisi generations
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