OM656 Stage 1 Tuning: Power Boost for Mercedes

Nick M · BlueChip.lv master technician, chip tuning & diagnostics Published 18.09.2026

Why Opt for Stage 1 Tuning?

Many drivers come to my workshop in Riga asking about the benefits of Stage 1 tuning for their Mercedes-Benz OM656 engines. The OM656, a modern inline 6-cylinder diesel engine, offers a factory power range from 245 to 340 hp. However, these figures are often conservative due to marketing strategies and tax regulations in the EU. By opting for Stage 1 tuning, you can unleash the engine's true potential, achieving significant power gains without compromising on safety.

Driving Experience: Feel the Difference

After a Stage 1 tune, drivers often report a noticeable improvement in their vehicle's performance. The turbo lag disappears, and the throttle response becomes more immediate. The engine delivers robust torque starting from 1800 RPM, making overtaking maneuvers effortless. Additionally, the automatic transmission shifts more smoothly, enhancing the overall driving experience.

Safety and Reliability

At BlueChip.lv, we prioritize the safety and reliability of your vehicle. Our tuning process involves reading and saving the original ECU map using the genuine Alientech KESS V3 programmer. This ensures that you can always revert to the stock settings if needed, at no extra cost. Importantly, all modifications are performed on stock hardware, maintaining the integrity of your vehicle's components.

OM656 vs. OM642: A Comparison

The OM656 engine, with its advanced turbocharging and injection systems, offers a higher tuning potential compared to its predecessor, the OM642. This results in more significant power and torque gains, enhancing the overall performance of your Mercedes-Benz.

Note: All tuning modifications are intended for off-road use only and may affect vehicle warranty and emissions compliance.