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Mercedes-Benz S W221 - 2005 - 2013 350 CDI BlueTec 258hp Stage 1 Chip Tuning · ECU Remap

Name: Mercedes-Benz S W221 - 2005 - 2013 350 CDI BlueTec 258hp Stage 1 Chip Tuning
Brand: Mercedes-Benz

Catalog reference — not a measured result for this vehicle.

How much bhp does Mercedes-Benz S W221 350 CDI BlueTec 258hp chip tuning add?

Catalog reference: power 258 → 300 bhp, difference +42 bhp (16%); torque 620 → 700 Nm. Actual results depend on vehicle condition and measurement.

Power258 → 300 bhp+42 bhp (+16%)

Torque620 → 700 Nm+80 Nm (+13%)

Figures are typical ranges; exact results depend on the vehicle's hardware and dyno measurement.

Stage 1 Remap EGR Delete DPF Delete AdBlue / SCR Delete DTC / Fault Code Removal

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Mercedes-Benz S W221 - 2005 - 2013 350 CDI BlueTec 258hp

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Reversible: Yes, the original software is kept

Mercedes-Benz S W221 - 2005 - 2013 350 CDI BlueTec 258hp — Stage 1 Remap

Stage 1 re-calibrates the ECU software — boost, fuelling and ignition maps — within the factory hardware's safe tolerances. No hardware changes are required.

DPF Delete, EGR Delete, AdBlue / SCR Delete

Mercedes-Benz S W221 - 2005 - 2013 350 CDI BlueTec 258hp — Software deactivation of the diesel particulate filter (DPF/FAP) functions and fault codes. Verified software is used for AdBlue / SCR Delete, NOx Sensor Delete and EGR Delete fault solutions.

Solutions for this vehicle

Mercedes-Benz S 350 CDI BlueTec 258hp AdBlue fault solution Mercedes-Benz S 350 CDI BlueTec 258hp DPF fault solution Mercedes-Benz S 350 CDI BlueTec 258hp EGR fault solution

Mercedes-Benz S 350 CDI Stage 1: all generations →

Stage 1 Remap

Software that optimises the engine's power and torque maps within safe limits.

EGR Delete

Software deactivation of the exhaust gas recirculation (EGR) valve control and fault codes.

DPF Delete

Software deactivation of the diesel particulate filter (DPF/FAP) functions and fault codes.

AdBlue / SCR Delete

Software deactivation of the AdBlue/SCR dosing system and its fault/warning functions.

DTC / Fault Code Removal

Switching off selected diagnostic trouble codes (DTC) in the ECU software.

OUTSIDE TÜRKİYE?

Where can this be done near you?

Prime Chiptuning applies the software at its own centres in Türkiye. Abroad, our partners carry out the work with the same files, and workshops can order the file directly.

ENGINE FAMILY

About the Mercedes-Benz OM642 3.0 V6 CDI (280 / 300 / 320 / 350 CDI, BlueTEC)

The OM642 is the 3.0-litre V6 diesel of the Mercedes C, E, S, ML, GL, GLE, Vito and Sprinter, from 190 to 265 hp. BlueTEC versions are equipped with AdBlue. It is a refined, torque-focused engine.

How a Stage 1 remap works on the Mercedes-Benz S W221 350 CDI BlueTec 258hp

Stage 1 recalibrates boost, injection and torque maps for a substantial mid-range torque gain. The automatic gearbox torque capacity is respected. Towing and long-distance performance improve markedly.

Pre-remap checklist

Oil cooler seals and turbo oil leaks, the known issue of this engine.
Intake manifold swirl flap mechanism.
DPF load and AdBlue system (BlueTEC).
Boost leaks and intercooler.

This section is based on Prime Chiptuning workshop experience; the power and torque figures come from the catalogue measurement above.

ECUs used in Mercedes-Benz vehicles

If you know your ECU family, its page lists exactly which solutions are available for it.

DELPHI CRD3 (ALL)BOSCH EDC16C31 BOSCH EDC17C66 BOSCH MD1CP001 DELPHI CRD2 (ALL)BOSCH EDC17C46 BOSCH EDC16 BOSCH EDC17C10 All ECU families →

Mercedes-Benz S — Power Calculator

Engine	Power	Gain
250 CDI 204hp	204 → 230 bhp	+26 bhp
320 CDI 211hp	211 → 260 bhp	+49 bhp
320 CDI 235hp	235 → 260 bhp	+25 bhp
350 CDI 235hp	235 → 290 bhp	+55 bhp
400 Hybrid 299hp	299 → 314 bhp	+15 bhp
420 CDI 320hp	320 → 360 bhp	+40 bhp
450 CDI 320hp	320 → 360 bhp	+40 bhp
500 - 388hp	388 → 408 bhp	+20 bhp
500 Turbo 435hp	435 → 480 bhp	+45 bhp
600 V12 Turbo 517hp	517 → 585 bhp	+68 bhp
63 AMG 525hp	525 → 541 bhp	+16 bhp
63 AMG Turbo 544hp	544 → 590 bhp	+46 bhp

Frequently asked questions

How much bhp does Mercedes-Benz S W221 350 CDI BlueTec 258hp chip tuning add?

Catalog reference: power 258 → 300 bhp, difference +42 bhp (16%); torque 620 → 700 Nm. Actual results depend on vehicle condition and measurement.

Will chip tuning damage the engine?

No. Values stay inside the safety margin the manufacturer leaves; engine, gearbox and turbo limits are not exceeded. Every file is verified with a road test and data logging. If the car needs maintenance first (worn injectors, blocked filter, weak clutch) we tell you before starting.

Will my fuel consumption go up?

With the same driving style it usually drops, because you hold the same speed at lower revs and less throttle. If you use the extra power, consumption naturally rises. It is down to your right foot.

How long does it take? Do I leave the car?

Most cars take 1–2 hours and you get the car back the same day; no need to leave it. Some models need the ECU removed, which takes longer — we tell you when booking.

Can I go back to stock later?

Yes. The original file is read and archived before any work. We restore the factory software free of charge whenever you ask.

Does it void my warranty?

Changing engine software can affect the manufacturer warranty. If a dealer finds a fault to be software related, they may refuse that claim. We want you to decide knowing this. Your original file stays with us and can be restored before a dealer visit.

Will it pass the roadworthiness test?

Stage 1 power software does not touch emission hardware. Work on emission systems is offered only for uses permitted by law; road use and inspection compliance remain the owner's responsibility.

How much does Mercedes-Benz S W221 350 CDI BlueTec 258hp chip tuning cost?

Price depends on the vehicle, the ECU and the solution chosen. Send us your vehicle details on WhatsApp and we will quote straight away. Inspection and measurement are free.

How is the work done?

We scan for faults and read the original software first. The file is adapted to your car's hardware, written, and verified on a road test. The original is archived.

Is DPF Delete possible on the Mercedes-Benz S W221 350 CDI BlueTec 258hp?

Yes. Our library contains a verified DPF Delete solution for the Mercedes-Benz S W221 350 CDI BlueTec 258hp. Once your original file is read, compatibility is checked and the job is applied.

What is checked on the Mercedes-Benz S W221 350 CDI BlueTec 258hp before remapping?

Before working on the Mercedes-Benz OM642 3.0 V6 CDI (280 / 300 / 320 / 350 CDI, BlueTEC) we check: Oil cooler seals and turbo oil leaks, the known issue of this engine. Intake manifold swirl flap mechanism. DPF load and AdBlue system (BlueTEC). Boost leaks and intercooler. If something needs attention, maintenance comes first; the remap is applied to a healthy engine.

⚠ Software work on emission systems is offered only for uses permitted by applicable law (motorsport, off-road use, export, fault diagnosis, etc.). Road use and inspection compliance of the vehicle remain the owner's responsibility.