Mercedes-Benz C 300de 306hp Remap

Name: Mercedes-Benz C 300de 306hp ECU Remap
Brand: Mercedes-Benz

Expected gains of +29 BHP and +60 Nm torque

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BHP+29 hp (9%)

Standard

306 hp

Tuned

335 hp

Torque+60 Nm (9%)

Standard

700 Nm

Tuned

760 Nm

Suitability

Moderate (5.5/10)

Gains Profile

Balanced

Headroom

Low

Mercedes-Benz C 300de 306hp ECU Remapping

Considering an ECU remap for your Mercedes-Benz C 300de 306hp? A Stage 1 remap can take this W205 - 2018 - 2021 diesel engine from 306 BHP to 335 BHP and from 700 Nm to 760 Nm of torque (turbocharged). This engine scores 5.5/10 for remap suitability. Get a free personalised quote from a trusted remap professional and find out exactly what your Mercedes-Benz C can achieve.

How this engine compares

60thof 99 Mercedes-Benz C engines by power gain
38%of the 9,842 engines we hold gain data for see a smaller power increase
41%of engines with torque data see a smaller torque increase

Comparisons are calculated from our own recorded Stage 1 figures.

Assessment

The Mercedes-Benz C 300de 306hp is a 1.9L turbocharged diesel engine producing 306 BHP and 700 Nm from the factory. With a typical Stage 1 remap, output increases to approximately 335 BHP and 760 Nm — a gain of around 29 BHP (9%) and 60 Nm (9%).

This engine has moderate remap suitability, with a balanced spread of gains across both power and torque — providing a noticeable improvement across the rev range. The tuning headroom is classified as limited, based on the percentage gain available from the factory output.

All figures shown are typical estimates based on aggregated Stage 1 data for this engine variant. Actual results depend on vehicle condition, mileage, and the chosen tuning method. We recommend discussing your specific vehicle with a qualified remap professional.

Other C W205 - 2018 - 2021 Engines

Engine	BHP	Gain	Torque	Gain	Score
180d 122hp	122 → 160	+38	300 → 380	+80	Good (7.5/10)
160 (1600cc) - 129hp	129 → 175	+46	210 → 310	+100	Good (6.5/10)
160 (1497cc) - 129hp	129 → 175	+46	210 → 295	+85	Good (6.5/10)
200d 150hp	150 → 200	+50	320 → 440	+120	Excellent (8/10)
180 (1600cc) - 156hp	156 → 175	+19	250 → 310	+60	Moderate (5.5/10)
180 (1500cc) - 156hp	156 → 175	+19	250 → 295	+45	Moderate (5.5/10)
200d 160hp	160 → 180	+20	360 → 400	+40	Good (6.5/10)
200 (1500cc) - 184hp	184 → 220	+36	280 → 350	+70	Moderate (5.5/10)
220d 194hp	194 → 220	+26	400 → 460	+60	Good (6.5/10)
300d 245hp	245 → 270	+25	500 → 560	+60	Good (6.5/10)
300 - 258hp	258 → 275	+17	370 → 450	+80	Moderate (4.5/10)
300e 320hp	320 → 350	+30	700 → 750	+50	Limited (3.5/10)
400 - 333hp	333 → 415	+82	480 → 600	+120	Moderate (5.5/10)
43 AMG 390hp	390 → 420	+30	520 → 620	+100	Moderate (4.5/10)
63 AMG 476hp	476 → 570	+94	700 → 820	+120	Moderate (5/10)
63 AMG S 510hp	510 → 570	+60	700 → 820	+120	Moderate (4.5/10)

Technical Specifications

Fuel Type: Diesel
Aspiration: Turbocharged
Displacement: 1.9L
Capacity: 1950 CC
Type: Car
Engine Family: Mercedes-benz 1.9L Turbo Diesel

ECU & Transmission

Likely ECU Low confidence: Bosch EDC17-era diesel ECU (varies)
Gearbox Low confidence: Transmission varies by trim and market; check manual/automatic type and torque rating. At this torque level, transmission and driveline servicing history becomes especially important.

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Confirm Your Vehicle

MakeMercedes-Benz

ModelC

GenerationW205 - 2018 - 2021

Engine300de 306hp

All figures shown are typical estimates based on aggregated Stage 1 data for this engine variant. Actual results depend on vehicle condition, mileage, and the chosen tuning method.

We recommend discussing your specific vehicle with a qualified remap professional before proceeding.