Mercedes Citan 1.5 DCI EU5 75 hp — Stage 1 file (+35 hp)

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Chip tuning for Mercedes Citan 1.5 DCI EU5 75 hp ECU

Mercedes Citan (2012 - W415) 1.5 DCI EU5 75 hp — premium diesel engine of the passenger segment of the Mercedes-Benz Group AG (Mercedes-Benz, AMG, Maybach, Smart, EQ) group (Германия, 1926). Stage 1 chip tuning raises power from 75 to 110 hp (+35 hp, +47%) and torque from 180 to 240 Nm (+60 Nm). ECU — Bosch EDC17C42. Flashing method: OBD or Bench depending on the unit's protection. A diesel built in 2012 — the Tricore ECU era; OBD flash works on most production revisions.

The Mercedes slogan is 'Das Beste oder nichts' ('The best or nothing'). Smart is Mercedes's city sub-brand, historically running Mitsubishi and Renault engines. Karl Benz is credited as the inventor of the automobile with the 1886 Patent-Motorwagen. Mercedes diesels have long been popular with the German police and taxi services. Mercedes diesel engines are fitted to passenger cars and commercial vehicles. BlueTEC is Mercedes's proprietary exhaust after-treatment system with an SCR catalyst and AdBlue.

Stage 1 on Mercedes often requires refreshing the adaptations after the flash. On Mercedes up to the recent generation, Stage 1 OBD flash is available. In the Mercedes commercial segment, Stage 1 focuses on torque. On naturally aspirated Mercedes engines without a turbo, the main effect is on throttle response. In the Mercedes city segment, Stage 1 is more about comfort and responsiveness than power. On low-output Mercedes engines, Stage 1 is safe and does not over-stress the hardware.

Frequently asked questions

How much does the power of the Mercedes Citan 1.5 DCI EU5 75 hp increase after Stage 1?

Stage 1 chip tuning on the Mercedes Citan 1.5 DCI EU5 75 hp boosts engine output by 35 hp: from 75 to 110 hp. Torque rises from 180 to 240 Nm (+60 Nm).

What changes in the Mercedes Citan ECU after Stage 1?

Stage 1 chip tuning of the Mercedes Citan is a rework of the ECU maps: boost pressure, ignition advance, target lambda and the removal of factory torque limiters. The gain is +35 hp with no hardware changes.

What does chip tuning give on the low-output Mercedes Citan 1.5 DCI EU5 75 hp?

Yes, Stage 1 on the low-output Mercedes Citan 1.5 DCI EU5 75 hp delivers a moderate but genuine gain — without overstressing the hardware. On base naturally aspirated engines the effect is felt mainly as improved throttle response and a stronger mid-range.

How much does Stage 2 add on the Mercedes Citan?

Stage 2 for the Mercedes Citan 1.5 DCI EU5 75 hp is Stage 1 plus hardware changes: a downpipe, a larger intake and a performance intercooler. The gain is considerably higher, but it requires professional component selection.

Which ECU is fitted to the Mercedes Citan 1.5 DCI EU5 75 hp?

The Mercedes Citan 1.5 DCI EU5 75 hp ECU is the Bosch EDC17C42. Production versions support OBD access; locked variants require Bench (BDM/JTAG).

What happens to the Mercedes Citan warranty after chip tuning?

The factory warranty of the Mercedes Citan does not remain valid after Stage 1 — the manufacturer withdraws its obligations once the ECU software is changed. CHIPOK provides its own warranty on its work and support.

How long does remapping the Mercedes Citan take?

On the Mercedes Citan 1.5 DCI EU5 75 hp: OBD flash 25-30 minutes, Bench (if required) about an hour. The file processing itself takes 5-30 minutes once the original bin is received.

Is the original file kept when chip tuning the Mercedes Citan?

Yes, the original ECU firmware of the Mercedes Citan 1.5 DCI EU5 75 hp is kept and can be flashed back at any time. Returning to stock via OBD takes 25-30 minutes.

What is the price of a Stage 1 remap for the Mercedes Citan?

Stage 1 for the Mercedes Citan 1.5 DCI EU5 75 hp is paid for with CHIPOK credits (1 cr = 1 €). The final amount is set in the calculator, taking the extra options (off functions) into account.

Last updated: 01.09.2026 · Source: manufacturer technical documentation · Measurements: CHIPOK dyno