TunedMercedes M271 Tune

Description

Expected Output

The M177 easily tunes to 240HP and 260TQ (350nm) in a stage one very light tune calibration and achieves approximately another 10-20 HP with air intakes, another 20 HP with 400 cell metallic cats, and an additional 20HP with ethanol blend fuel mix.  This tune works by allowing the engine to make its full operational capability.

The Process

As soon as an order is placed we confirm all your details through direct communication.  Most of the time we will send you a few items in a TunedMercedes mailer.  These will connect your car to your windows laptop as long as this laptop isn’t locked in some corporate or school mode.  This process has 3 parts.

Step 1 Reading the ECU

TunedMercedes technician will remote desktop into your windows laptop while connected to the car.  They will read your current software configuration and confirm we have access to the file on the servers to perform a “virtual read”.

Step 2 Calibration

Our technicians will calibrate your file matching your modifications to your car’s exact software.  The calibrations take place in this model will take part in a special part of the ECU that is designed to be modified or calibrated.

We are telling the ECU that we expect more air and we want more power in these areas.  For example raising the top speed isn’t done by tricking the car into thinking it is going slower (this is what a piggy back tuner does in an extremely simplified example) it actually tells the computer in the programmed area to go to 200 mph or whatever is suitable for your current tire rating.

Step 3 Writing

At this point we will have our technician log back in during a scheduled session where the laptop and car are connected with supplied gear that we shipped quickly to you. In this session we will write the calibrated file back to your ECU.

In certain rare cases we may ask you to send your ECU or come in for a bench flash if there is no matching software found.

Bench Flash Method

Step 1

Remove the ECU, take pictures of it, send it to us packaged and we will read it on the bench, then calibrate it, then write the software on the bench.

Step 2

Reinstall the ECU

What to Expect

Expect faster throttle response and tunedmercedes experience while retaining stock-ish feel.  The end result is a car that feels like it was factory tuned for 620hp.

The car will likely be louder on downshifts and smoother on deceleration and the fans will be louder.  The car should pull very smoothly and provide an excellent experience rolling performance and 60-130 times that will rival most cars on the road.