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Mercedes-Benz E-Class

Battery parameters

The Mercedes-Benz E-Class has 8 battery parameters.

● Confirmed◆ In testing○ Supported× Not supported

How to read a parameter card

Auxiliary battery voltage MERCEDES_AUX_VConfirmed

Pelican can show this parameter as the starter battery voltage.

  • Request22 20 05
  • Service 22DID 2005
  • Module7E5
  • Every1 s
  • Testing

Example reply from a 2021 Mercedes-Benz E-Class.

Bits 0 to 7 of the reply, 8 bits.

0x77 = 119 → (119 × 25.9 ÷ 255) = 12.086667 V

Formula
(val × 25.9 ÷ 255)
Range
0 to 25.9 V
Unit
V

Confirmed for 2016, 2018 to 2021. In testing for 1993 to 2015, 2017, 2022 to 2023.

  1. The parameter's name and its ID in the OBDb. Confirmed shows when a response from a real car confirms the parameter.
  2. The clutch mark shows a Connectable, a parameter that Pelican surfaces in its interface.
  3. The service and PID/DID asked for, the control module it's sent to, and how often Pelican asks.
  4. The reply's bytes. The parameter's bytes are blue. Bytes for other parameters in the same reply are grayed out. Hover over a byte to see the parameter it represents.
  5. Where the parameter is in the response, and how Pelican converts the raw value into a value.
  6. A real reply, decoded. The raw value comes first, then the reading.
  7. Which model years have tested this parameter.

12V system voltage, hd MERCEDES_AUX_V_HD

Pelican can show this parameter as the starter battery voltage.

  • Request22 02 01
  • Service 22DID 0201
  • Module624 → 5A4
  • Every1 s
  • Testing

Bits 16 to 31 of the reply, 16 bits.

Formula
(val × 1000 ÷ 10000)
Range
0 to 100 V
Unit
V

In testing for 1993 to 2015, 2017, 2022 to 2023. Not supported for 2016, 2018 to 2021.

Auxiliary battery voltage MERCEDES_AUX_VConfirmed

Pelican can show this parameter as the starter battery voltage.

  • Request22 20 05
  • Service 22DID 2005
  • Module7E5
  • Every1 s
  • Testing

Example reply from a 2021 Mercedes-Benz E-Class.

Bits 0 to 7 of the reply, 8 bits.

0x77 = 119 → (119 × 25.9 ÷ 255) = 12.086667 V

Formula
(val × 25.9 ÷ 255)
Range
0 to 25.9 V
Unit
V

Confirmed for 2016, 2018 to 2021. In testing for 1993 to 2015, 2017, 2022 to 2023.

Control module voltage VPWRSAE J1979Confirmed

Power input to the OBD control module. VPWR is normally battery voltage, less any voltage drop in the circuit between the battery and the control module.

Pelican can show this parameter as the starter battery voltage.

  • Request01 42
  • Service 01PID 42
  • Module7E0 → 7E8
  • Every10 s

Bits 0 to 15 of the reply, 16 bits.

Formula
(val ÷ 1000)
Range
0 to 65535 V
Unit
V

Confirmed for 2012, 2016, 2018, 2021. Supported for 2002, 2005, 2017, 2019 to 2020.

DC converter requested voltage MERCEDES_CNVRTR_REQ_VConfirmed

  • Request22 60 71
  • Service 22DID 6071
  • Module7E5
  • Every1 s
  • Testing

Example reply from a 2021 Mercedes-Benz E-Class.

Bits 0 to 15 of the reply, 16 bits.

0x05A0 = 1440 → (1440 × 250 ÷ 10000) = 36 V

Formula
(val × 250 ÷ 10000)
Range
0 to 100 V
Unit
V

Confirmed for 2018 to 2021. In testing for 1993 to 2015, 2017, 2022 to 2023. Not supported for 2016.

HV battery amperage MERCEDES_HV_AConfirmed

  • Request22 60 53
  • Service 22DID 6053
  • Module7E5
  • Every1 s
  • Testing

Example reply from a 2021 Mercedes-Benz E-Class.

Bits 0 to 15 of the reply, 16 bits. The value is signed.

0x0000 = 0 → (0 ÷ 10) = 0 A

Formula
(val ÷ 10)
Range
0 to 100 A
Unit
A

Confirmed for 2018 to 2021. In testing for 1993 to 2015, 2017, 2022 to 2023. Not supported for 2016.

HV battery coolant temperature MERCEDES_HV_COOLANT_T

  • Request22 25 26
  • Service 22DID 2526
  • Module7E5
  • Every5 s
  • Testing

Bits 0 to 15 of the reply, 16 bits. The value is signed.

Formula
(val × 1250 ÷ 10000)
Range
0 to 100 °C
Unit
°C

In testing for 1993 to 2015, 2017, 2022 to 2023. Not supported for 2016, 2018 to 2021.

HV battery state of charge MERCEDES_HV_SOCConfirmed

Pelican can show this parameter as the state of charge.

  • Request22 60 50
  • Service 22DID 6050
  • Module7E5
  • Every1 s
  • Testing

Example reply from a 2021 Mercedes-Benz E-Class.

Bits 0 to 15 of the reply, 16 bits.

0x1068 = 4200 → (4200 ÷ 100) = 42 %

Formula
(val ÷ 100)
Range
0 to 100 %
Unit
%

Confirmed for 2018 to 2021. In testing for 1993 to 2015, 2017, 2022 to 2023. Not supported for 2016.

HV battery voltage MERCEDES_HV_VConfirmed

  • Request22 60 75
  • Service 22DID 6075
  • Module7E5
  • Every1 s
  • Testing

Example reply from a 2021 Mercedes-Benz E-Class.

Bits 0 to 15 of the reply, 16 bits.

0x0000 = 0 → (0 × 25 ÷ 1000) = 0 V

Formula
(val × 25 ÷ 1000)
Range
0 to 100 V
Unit
V

Confirmed for 2018 to 2021. In testing for 1993 to 2015, 2017, 2022 to 2023. Not supported for 2016.

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