Location of fuses and relays on Mercedes-Benz E-Class All Models, 2003 to 2008.

If you replace any fuses, replace them with the same fuse type and amp rating. If there is an underlying problem, you could overload the wires or even cause damage to the circuit if you use a higher amperage fuse. Ensure the new fuse you are installing has the same color and amperage rating as the old one. If you install a new fuse and it blows again, you could have a short or a problem with that circuit, and diagnose the circuit before installing another fuse. When you replace fuses, make sure your ignition is off.

You can get a lot of fuses for cheap on Amazon, like these here. Make sure to replace the fuses with the correct color and amperage rating. If the fuse tests good and the problem persists, the fault is in the circuit or the module itself.

Fuse Colors and Amp Ratings

Fuse Color	Ampere
Black	1
Beige	5
Brown	7.5
Red	10
Blue	15
Yellow	20
White	25
Green	30
Amber	40
Red	50
Blue	60

Fuses &  Relays

FUSES AND RELAY IN TRUNK
F001	30 A	Driver Seat Power
F002	30 A	Passenger Seat Power
F003	7.5 A	Navigation
F003	7.5 A	Parktronic
F003	7.5 A	Tire Pressure Control
F003	7.5 A	TV
F004	20 A	Fuel Pump
F005	20 A	–
F006	40 A	Audio Gateway
F007	15 A	Emergency Light T model
F008	7.5 A	Antenna Module
F009	25 A	Roof Unit
F010	40 A	Window Defroster Rear
F011	20 A	Tailgate Control Unit
F012	15 A	Plug Socket Trunk
F013	15 A	Plug socket Rear
F013	15 A	Pneumatic Adjustable Seat
F014	5 A	–
F015	10 A	Fuel Tank Locking
F016	20 A	Heated Seat Rear
F017	20 A	Trailer Power Supply
F018	20 A	Trailer Control Unit
F019	20 A	Electronic control unit for additional rear light
F019	20 A	Pneumatic Adjustable Seat
F020	7.5 A	Window Shade Rear
F020	30 A	3rd Stop Light
Relay	kA	Fuel Pmp
Relay	kB	Relay 2 Circuit 15R
Relay	kC	Reserve 2
Relay	kD	Rear Wiper
Relay	kE	Rear Window Defroster
Relay	kF	Relay Circuit 15R
Relay	kG	Fuel Filler Cap Polarity Change 1 Relay
Relay	kH	Fuel Filler Cap Polarity Change 2 Relay
FUSES INSIDE, ON THE SIDE OF THE DASH
F021	30 A	Door Control Unit Rear Right
F022	30 A	Door Control Unit Passenger
F023	30 A	Passenger Set Adjustable Memory
F024	25 A	Keyless Go
F025	20 A	Additional Heating with/without remote start
F026	7.5 A	CD Changer
F027	Reserve	–
F028	5/15 A	Radio
F029	7.5 A	Steering Column Module
F029	7.5 A	Steering Column Module
F030	7.5 A	Diagnostic Socket
F031	5 A	Switch Off Relay
F031	5 A	Top switch panel
F032	30 A	The door control unit rear left
F033	30 A	Door control unit driver
F034	30 A	Driver seat adjustable/memory
F035	5 A	Weight sensing system
F036	25 A	Heated seat front
F037	5/15 A	Control Unit Height Adjustment
F037	5/15 A	Airmatic
F038	–	Reserve
F039	5 A	Bottom Switch Panel
F040	10 A	Steering wheel heating
F041	5 A	Central Gateway
F042	7.5 A	Engine Control Module
F042	7.5 A	Fuse and Relay Box Driver
Engine Compartment Fuses and Relays
F43	15 A	–
F44	15 A	–
F45	7.5 A	–
F46	7.5 A	–
F47	5 A	ESP, SPS, PML &BAS control unit N47-5
F48	7.5 A	Restraint Systems Control Unit N2/7
F49	7.5 A	–
F50	5 A	–
F51	5 A	–
F52	7.5/10 A	Rotary light switch S1, Cluster, Glove Compartment
F53a	15 A	Fanfare horn relay N10/1kO
F53b	15 A	Aside from always powered, B side has no power with the ignition off
F54a	15 A	Cigarette Lighter
F54b	15 A	Aside from no power with ign. Off, the B side is always powered.
F55	7.5 A	–
F56	40 A	Wiper Motor
F57	25 A	–
F58	15 A	Ignition Coils
F59	15 A /20 A	Starter Relay
F60	10 A	Oil cooler fan
F61	40 A	Electric air pump
F62	30 A/20 A	SEQ Pump Control relay N10/1kM
F63	15 A	Circuit 87 relay, engine N10/1kl
F64	7.5 A	Rotary light switch, more
F65	20 A	EIS EZA Unit N73 Steering lock unit N26/5
F66	7.5 A	Right/left front lamp unit E2, E1
Relay	kI	Circuit 87 relays, engine
Relay	kJ	–
Relay	kK	Circuit 87 relays chassis.
Relay	kL	Starter Relay
Relay	kM	SEQ ASG Pump Control Relay
Relay	kN	Circuit 15 relay
Relay	kO	FAN Relay Module
Relay	kP	Circuit 15R relay
Relay	kQ	–
Relay	kR	Air pump or oil cooler fan relay
Relay	kS	AirMatic Relay K67
Relay	kT	Cutoff relay to interruptible loads K75
Front Pre-Fuse Power Distribution Block
F70	150 A	–
F71	150 A	M4/7 Electric suction fan with integrated control
F72	50 A	A7/3 Traction system hydraulic unit
F73	40 A	A7/3 Traction system hydraulic unit
F74	40 A	K67 Airmatic Relay
F75	40 A	N10/11 Passenger SAM P
F76	40 A	N22 Air Conditioning Control Module
F77	–	Reserved
Rear Pre-Fuse Block in the Trunk
F78	200 A	N10/1 Driver SAM D
F79	200 A	N10/2 Rear SAM-R
F80	150 A	N10/1 Driver SAM D
F82	150 A	N3/10 Control Module
F83	10 A	Reserved
F84	5 A	N82 Battery Control Module
F85	5 A	N112 Communication Platform and A35/11 VCS
F86	5 A	x58/1 Interior Socket
F87	40 A	M40/1 Pneumatic Pump of Dynamic Seat Control
F88	30 A	N121 Trunk Closer Module

What is the Best Scanner for Diagnosing Tripped Fuses and Broken Relays on a Mercedes-Benz?

If the fuse tests good but the circuit still does not work, scan the affected control module before replacing parts. The UCAN-II Pro reads full system fault codes and provides full AI Diagnosis, live data, bidirectional tests, built-in TPMS sensor programming, a rear VIN scanning camera, coverage for 140+ makes, 3,500+ active tests, and 1,000+ special functions. There is no subscription, and no AutoAuth is required.

Overall, the YOUCANIC full system diagnostic scanner is invaluable for any Mercedes-Benz owner or technician looking to troubleshoot problems quickly and accurately. With its user-friendly interface and powerful diagnostic capabilities, you can save time, money, and frustration by diagnosing and resolving issues with your Mercedes-Benz quickly and efficiently.