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Home >> Mercedes Benz >> 2019 >> GLC300 Base >> Repair and Diagnosis >> Electrical >> Motors, Switches, Relays >> Electrical System, Equipment & Instruments - 253 Chassis - 6 Of 7 >> Wiring Diagrams >> Wiring Diagram, Special Vehicle Multifunction Control Unit (SVMCU (MSS)) >> Wiring Diagram, Special Vehicle Multifunction Control Unit (SVMCU (MSS)) - PE54.21-P-2105-97FCA

Wiring Diagram, Special Vehicle Multifunction Control Unit (SVMCU (MSS)) - PE54.21-P-2105-97FCA

Model 253 (except 253.99) as of model year 2020 

with code 970 (Police emergency vehicle) 

with code 974 (Preparation for fire service command vehicle) 

with code 975 (Preparation for emergency doctor vehicle) 

Control unit N26/14 

Code: Designation: Position:
A0 Use of wiring diagrams 129L
A2/11 Video system 118L
A2/11 Video system 117L
A2/11 Video system 116A
A48/1 Special signal system operating unit 44L
CAN B Interior CAN 66K
Code 24Z Sepura Tetra radio pre installation 85A
Code 962 Hella roof attachment 9D
Code 962 Hella roof attachment 15D
E38 Trunk lid/rear-end door flashing light 11L
F80/1 Special-purpose vehicle fuse block 1 15L
F80/1f5 Fuse 5 16K
F80/1f6 Fuse 6 17K
H4/27 Center instrument panel speaker 101L
K40/5 Rear fuse and relay module 4L
K40/5f427 Fuse 427 3L
K40/5f443 Fuse 443 2L
K40/5f450 Fuse 450 5L
N26/14 Special vehicle multifunction control unit (SVMCU [MSS]) 4A
N26/14 Special vehicle multifunction control unit (SVMCU [MSS]) 12A
N26/14 Special vehicle multifunction control unit (SVMCU [MSS]) 20A
N26/14 Special vehicle multifunction control unit (SVMCU [MSS]) 28A
N26/14 Special vehicle multifunction control unit (SVMCU [MSS]) 36A
N26/14 Special vehicle multifunction control unit (SVMCU [MSS]) 44A
N26/14 Special vehicle multifunction control unit (SVMCU [MSS]) 52A
N26/14 Special vehicle multifunction control unit (SVMCU [MSS]) 60A
N26/14 Special vehicle multifunction control unit (SVMCU [MSS]) 75A
N26/14 Special vehicle multifunction control unit (SVMCU [MSS]) 68A
S93/2 Two-way radio switch 62L
W12/1 Right center console ground point 61H
W15/7 Right front footwell ground point 19H
W15/7 Right front footwell ground point 53E
W15/7 Right front footwell ground point 113L
W3/11 Left rear wheel well ground point 46L
W3/11 Left rear wheel well ground point 4E
W3/11 Left rear wheel well ground point 79L
W3/11 Left rear wheel well ground point 82L
W3/8 Right rear wheel well ground point 8L
W8/2 Right tailgate ground point 11H
X1/47 Two-way radio main switch electrical connector 58H
X18 Cockpit wiring harness and frame floor assembly electrical connector 100H
X18/13 Speaker electrical connector 95A
X18/13 Speaker electrical connector 97A
X18/13 Speaker electrical connector 100A
X18/15 German Association of the Automotive Industry connecting point 20L
X18/15 German Association of the Automotive Industry connecting point 28L
X187 Engine run-on feature connecting point 56H
X250 Multipurpose module CAN connecting point (equipment carrier plate) 67H
X250/1 Multipurpose module CAN connecting point (HSK) 70H
X30/33 Right interior CAN (CAN B) potential distributor electrical connector 65L
X35/1 Driver door electrical connector 95H
X35/2 Front passenger door electrical connector 97H
X38 Speaker intermediate electrical connector 95E
X38 Speaker intermediate electrical connector 98E
X38 Speaker intermediate electrical connector 100E
X39/17 Glove compartment event data recorder button connecting point 108A
X39/18 Event data recorder switch connecting point 108L
X4/36 Vehicle socket electrical connector 6H
X41 Roof light bar separation point 41L
X41/2 Left and right roof light bar electrical connector 36L
X44/12 Two-way radio electrical connector 80L
X44/12 Two-way radio electrical connector 83L
X44/12 Two-way radio electrical connector 87L
X44/12 Two-way radio electrical connector 79A
X44/12 Two-way radio electrical connector 82A
X44/12 Two-way radio electrical connector 87A
X58/3 Microphone electrical connector 120A
X58/3 Microphone electrical connector 122A
X58/7 Socket (2-pin, 12V) 55H
X58/7 Socket (2-pin, 12V) 53H
X91/1 Tachograph electrical connector 47H
X91/1 Tachograph electrical connector 50H
X91/1 Tachograph electrical connector 52H
Z126/1Z1 Horn status connector sleeve 28G
Z14/1Z1 Microphone connector sleeve (+) 120L
Z14/2z1 Microphone connector sleeve (-) 121L
Z159z1 Tone sequence active connector sleeve 24F
Z159z1 Tone sequence active connector sleeve 45G
Z20/10z1 Wire end not stripped 102A
Z20/10z14 Wire end not stripped 115L
Z20/10z15 Wire end not stripped 114L
Z20/10z2 Wire end not stripped 104A
Z20/10z23 Wire end not stripped 74G
Z20/10z23 Wire end not stripped 72G
Z20/10z3 Wire end not stripped 105A
Z20/10z4 Wire end not stripped 107A
Z20/10z5 Wire end not stripped 102L
Z20/10z6 Wire end not stripped 104L
Z20/10z7 Wire end not stripped 105L
Z20/10z8 Wire end not stripped 107L
Z20/52z3 Two-way radio cut-in connector sleeve 75G
Z20/52z4 Two-way radio cut-in connector sleeve 77G
Z28/51z1 Mute connector sleeve 63E
Z37/83z1 Multifunction CAN high connector sleeve 22F
Z37/83z1 Multifunction CAN high connector sleeve 67E
Z37/84z1 Multifunction CAN low connector sleeve 21F
Z37/84z1 Multifunction CAN low connector sleeve 69E
Z47/15z1 Emergency vehicle warning light connector sleeve 26F
Z47/15z1 Emergency vehicle warning light connector sleeve 25F
Z47/15z1 Emergency vehicle warning light connector sleeve 44E
Z81/6z1 Tml. 58d connector sleeve 61E
Z87/19z1 Radio voltage supply connector sleeve 72E
Z87/8z1 Two-way radio cut-in connector sleeve 75E
G12938795Courtesy of MERCEDES-BENZ USA
G12938796Courtesy of MERCEDES-BENZ USA
G12938797Courtesy of MERCEDES-BENZ USA
G12938798Courtesy of MERCEDES-BENZ USA
G12938799Courtesy of MERCEDES-BENZ USA
G12938800Courtesy of MERCEDES-BENZ USA
G12938801Courtesy of MERCEDES-BENZ USA
G12938802Courtesy of MERCEDES-BENZ USA