Sound Generator, Component Description - GF49.10-P-2003RFH
Engine 274.9 in model 205.047/147/247, 253.353/953/954
with code B53 (External noise sound generator for hybrids and EV)
Engine 274.920 in model 205.053/054/253
with code B53 (External noise sound generator for hybrids and EV)
Engine 274.920 in model 253.354
with code B53 (External noise sound generator for hybrids and EV)
Engine 654.920 in model 205.013/213
with code B53 (External noise sound generator for hybrids and EV)
Show on model 253.9
Location
The sound generator in the vehicle is at the front right above the lower front Engine compartment paneling. For model 205, sound generator 2 (H4/134) is replacing the sound generator (H4/16) as of model year 2020. For model 205 as of model year 2020 and for model 253.353/953, there is an additional sound generator in the rear end in the right trim (model 205) and/or behind the left wheel (model 253.353/953).
Task
The sound generator serves in electric mode as an acoustic warning for other road users. Depending on speed and accelerator pedal position, the electric vehicle sound generator generates an audio signal between 0 and 30 km/h. At speeds greater than 30 km/h, the sound generator is deactivated, as the vehicle's rolling and wind noises are loud enough. The electric vehicle sound generator is connected to the hybrid CAN (CAN L).
The electric vehicle SOGE also active in reverse gear and in idle dependent on the legal requirements in the USA.
The sound generator can be deactivated using the menu in COMAND.
| Wiring diagram for sound generator control unit | Model 253 (except 253.99) up to model year 2020 with code B53 (External noise sound generator for hybrids and EVs) | PE54.21-P-2115-97FBA | |
| Model 205 as of model year 2019 with code B53 (External noise sound generator for hybrids and EVs) | PE54.21-P-2115-97FBB | ||
| Model 253 (except 253.99) as of model year 2020 with code B53 (External noise sound generator for hybrids and EVs) H4/16 | PE54.21-P-2115-97FCA | ||
| Model 253 (except 253.99) as of model year 2020 with code B53 (External noise sound generator for hybrids and EVs) H4/134, H4/135 | PE54.21-P-2115-97FCB |