Mercedes-Benz B-Class is a series of compact cars by the German automaker. It was first introduced in 2005 at the Geneva Motor Show, and was preceded by the Vision B concept car. It is produced in Rastatt. In this article we will understand in detail fuse box diagrams Mercedes B-Class (second generation; factory index W246 / T242) 2011, 2012, 2013, 2014, 2014, 2015, 2016, 2017, 2018, 2019 years of manufacture with designations B160, B180 CDI, B200, B220 4MATIC, B250.
Here you will find the locations and photos of the mounting blocks. Also, we will separately mark the fuses responsible for the cigarette lighter and the fuel pump.
In the engine compartment
The unit is located on the left side of the underhood. It consists of two parts: the power fuses and the main fuse panel.
Power fusible links
Located on the side of the main unit.
General view.
Diagram
No.
Description
Amps
F32k1
Decoupling relay (F32k1)
F1
Alternator 300A /
Electric Drive (W242): 400A DC voltage converter control unit
300 / 400
F2
Electric Drive (W242), and gasoline vehicles: Interior fuse box
200
diesel engines: Interior fuse box
250
F3
Electric power steering control module
100
F4
SAM management module
40
F5
Fan motor
80
F6
engine 607 - fuel heating control unit
70
F7
engine 607 - DPF regeneration auxiliary heater control unit
125
F8
engines: 651, 607 - Glow plug output stage module
100
Fuse box
Photo is an example.
Diagram
No.
Description
Amps
J
Horn (beep) relay
K
Wiper speed relay 1/2
L
Wiper relay on/off
M
Starter terminal 50 relay
Electric Drive (W242): Relay terminal 87C
N
Relay terminal 87M
O
Electric Drive (W242): Relay terminal 87 of the parking interlock control unit
Gearbox oil coolant circulation pump relay
P
Spare
Q
Electric Drive (W242): Brake booster vacuum pump power relay
Terminal 15 relay (unprotected)
R
Relay terminal 15
S
Relay terminal 87
T
Heated windshield relay
201
alarm siren
5
202
Auxiliary heater control unit
20
Electric Drive (W242): Terminal 87 relay of the parking lock control unit
5
203
Front right headlight
15
Electric Drive (W242): Transmission control unit
5
204
Control unit for the electronic traffic stabilization system
25
205
Left and right horn (beep)
15
206
engine 651: CDI control unit
5
Electric Drive (W242): Transmission control unit, Brake drive booster vacuum pump relay, Electric drive relay terminal 87M circuit relay
207
Diesel: Relay of the electric circuit terminal 87M
5
Electric Drive (W242): HV Battery Cooling Shutoff Valve, Parking Lock Control Unit
208
motors: 133, 607 - Relay terminal 87
7.5
Electric Drive (W242): Fan motor
5
209
Front left headlight
15
Electric Drive (W242): Not used
210
Heated front window relay
5
from 03.11.2014 - Starter Pre Relay
211
242.848 - CNG control unit
7.5
Electric Drive (W242): Heating circuit circulation pump