Where is the ECU on a Mercedes Benz?

Where is the ECU on a Mercedes Benz?

The ECU or engine control unit is located right on the top of the engine and can be seen in the cut out of the engine covers (red arrow). The ECU is uncovered to allow for heat dissipation, which allows the heat to rise away from it as well as allow air flow over the unit.

How do you reset the ECU on a Mercedes E class?

Mercedes-Benz E-Class and E-Class AMG: How to Reset ECU

1. Step 1 – Turn the car to ON. Insert the key into the ignition and turn the key to the ON position.
2. Step 2 – Depress the gas pedal.
3. Step 3 – Turn car off and release the gas pedal.
4. Step 4 – Wait.
5. Step 5 – Test drive.
6. Step 6 – Reset PCM.

What is an ECU on a Mercedes?

The Mercedes ECU or Mercedes ECM is a major component of your vehicle. It’s the onboard computer and it’s responsible for regulating your car’s engine. We often modify a Mercedes ECU/Mercedes ECM to help its engine run better, unlocking extra horsepower and torque (here’s one example of a recent C63s tune).

How do I unplug my ECU?

The ECU is a metal box with a white sticker displaying a four-digit code. Unplug the wiring harness from the hookup on the back of the ECU. Use a 10 mm socket to disconnect the bracket holding the ECU in place and pull the unit out of the glove box area. It can now be serviced or replaced as necessary.

How do I know my ECU is bad?

Here are the most common symptoms of a bad ECU:

1. Check Engine Light stays on after resetting.
2. Car was jump started on reverse polarity.
3. Engine turning off for no reason.
4. Water Damage or Fire Damage on the ECU.
5. Apparent loss of spark.
6. Apparent loss of injection pulse or fuel pump.
7. Intermittent starting problems.
8. Overheating ECU.

How does the ECU work on a Mercedes Benz?

This article applies to the Mercedes-Benz E-Class and E-Class AMG (2002-2009). The ECU (electronic control unit) adjusts the transmission for shifting smoothness and for maximizing fuel efficiency. If you drive aggressively, the ECU “learns” this driving style and adjusts the transmission accordingly.

Which is model do you actually have 1995 e320?

Which model do you actually have? 1995 E320 is W124 if it is american car, but W210 if it is european. Which model do you actually have? 1995 E320 is W124 if it is american car, but W210 if it is european. Click to expand… I’m not familiar with W124, requested mods to move to W124 forum.

Can a faulty ECU cause a CAN bus error?

And the California W124 is probably the rarest configuration. Assuming the ecco junk wiring was been addressed, an incorrect or improperly adapted ECU can cause CAN bus communication errors, especially on a California car as they have the additional Diagnostic Module which also communicates with the ECU via the CAN bus.