Engine Sound, Function - GF82.60-P-0019RF

Model 205, Model 253

with code B63 (Sporty engine sound)

Shown on model 205 except code 810 (Sound system), and except code 853 ("Midline" sound system)

Courtesy of MERCEDES-BENZ USA

Shown on model 205 up to model year 2019, model 253 up to model year 2020 with code 810 (Sound system)

Courtesy of MERCEDES-BENZ USA

Shown on model 205 as of model year 2019, model 253 as of model year 2020 with code 810 (Sound system)

Courtesy of MERCEDES-BENZ USA

Shown on model 205 as of model year 2019 with code 853 ("Midline" sound system)

Courtesy of MERCEDES-BENZ USA

Shown on model 253 as of model year 2020 except code 810 (Sound system)

Courtesy of MERCEDES-BENZ USA

Function requirements, general

Engine running.

Engine sound

The engine sound function simulates the sound of an engine and exhaust system, as this cannot be heard completely in its original form within the vehicle interior. Here, the driving condition and the engine load are taken into consideration. The simulated sound is output via the speaker system, even when no audio source is active. When audio output is active, the emitted tones are expanded with the simulated sound.

The driving condition is defined on the basis of the following signals, powertrain control unit sends over the powertrain CAN to the engine sound control unit, the sound system amplifier control unit (model 205 as of model year 2019, model 253 as of model year 2020 with code 810 (Sound system)), to the Midline sound system amplifier control unit (model 205 as of model year 2019 with code 853 ("Midline" sound system)), or to the head unit (model 253 as of model year 2020 except code 810 (Sound system)):

Transmission mode selection (transmission 722, 725)
Engaged gear range (transmission 722, 725)
Vehicle speed
Engine torque

The engine load is defined on the basis of the following signals, which the ME-SFI [ME] control unit sends over the powertrain CAN to the engine sound control unit, to the sound system amplifier control unit (model 205 as of model year 2019, model 253 as of model year 2020 with code 810 (Sound system)), to the Midline sound system amplifier control unit (model 205 as of model year 2019 with code 853 ("Midline" sound system)), or to the head unit (model 253 as of model year 2020 except code 810 (Sound system)):

Engine running status
Engine speed

The engine sound control unit evaluates all incoming information and generates the audio signals.

Model 205 up to model year 2019, model 253 up to model year 2020

Depending on the vehicle equipment, the engine sound control unit actuates the speaker system directly or via the sound system amplifier control unit (with code 810 (Sound system)).

Model 205 from model year 2019

Depending on the vehicle equipment, the engine sound control unit, the sound system amplifier control unit (with code 810 (Sound system)), or the Midline sound system amplifier control unit (with code 853 ("Midline" sound system)) actuates the speaker system directly.

Vehicles except code 810 (Sound system), and except code 853 ("Midline" sound system)

The engine sound control unit actuates the following speakers directly:

Left footwell woofer (right-hand drive vehicles)
Right footwell woofer (left-hand drive vehicles)
Left front door midrange speaker
Right front door midrange speaker
Left rear door/side panel midrange speaker (except model 205.3/4)
Right rear door/side panel midrange speaker (except model 205.3/4)
Left rear sidewall cover midrange speaker (model 205.3/4)
Right rear sidewall cover midrange speaker (model 205.3/4)

Vehicles with code 810 (Sound system)

The sound system amplifier control unit actuates the following speakers directly:

Center instrument panel speaker
Left footwell woofer (right-hand drive vehicles)
Right footwell woofer (left-hand drive vehicles)
Left rear surround sound system midrange speaker
Right rear surround sound system midrange speaker
Left front door tweeter
Right front door tweeter
Left rear door/side panel tweeter (except model 205.3/4)
Right rear door/side panel tweeter (except model 205.3/4)
Left front door midrange speaker
Right front door midrange speaker
Left rear door/side panel midrange speaker (except model 205.3/4)
Right rear door/side panel midrange speaker (except model 205.3/4)
Left rear sidewall cover midrange speaker (model 205.3/4)
Right rear sidewall cover midrange speaker (model 205.3/4)
Left rear sidewall cover tweeter (model 205.3/4)
Right rear sidewall cover tweeter (model 205.3/4)

Model 205 with code 853 ("Midline" sound system)

The Midline sound system amplifier control unit actuates the following speakers directly:

Center instrument panel speaker
Left footwell woofer (right-hand drive vehicles)
Right footwell woofer (left-hand drive vehicles)
Left front door tweeter
Right front door tweeter
Left rear door/side panel tweeter (except model 205.3/4)
Right rear door/side panel tweeter (except model 205.3/4)
Left front door midrange speaker
Right front door midrange speaker
Left rear door/side panel midrange speaker (except model 205.3/4)
Right rear door/side panel midrange speaker (except model 205.3/4)
Left rear sidewall cover midrange speaker (model 205.3/4)
Right rear sidewall cover midrange speaker (model 205.3/4)
Left rear sidewall cover tweeter (model 205.3/4)
Right rear sidewall cover tweeter (model 205.3/4)

Model 253 with code 853 ("Midline" sound system)

The head unit actuates the following speakers directly:

Center instrument panel speaker
Left front door midrange speaker
Right front door midrange speaker
Left rear door/side paneling midrange speaker
Right rear door/side paneling midrange speaker

The head unit actuates the following speakers via the subwoofer amplifier:

Left footwell woofer
Right footwell woofer

Electrical function schematic for speaker system	Model 205 up to model year 2019 with code B63 (Sporty engine sound), Model 253 with code B63 (Sporty engine sound)	PE82.62-P-2300-97FBA
	Model 205 as of model year 2019 with code B63 (Sporty engine sound)	PE82.62-P-2300-97FBB
	Model 253 (except 253.99) as of model year 2020 with code B63 (Sporty engine sound)	PE82.62-P-2300-97FBC
Overview of system components, telematics	Model 205 with code B63 (Sporty engine sound) Model 253 (except 253.99) up to model year 2020 with code B63 (Sporty engine sound)	GF82.85-P-9999RF
	Model 253 (except 253.99) as of model year 2020 with code B63 (Sporty engine sound)	GF82.85-P-9999RFM