2010 MERCEDES-BENZ SPRINTER AUX

Problem Possible causes/consequences and
0050 SolutionsThe auxiliary heating
does not switch on. The outside temperature is above 39 ‡ (4 †).
The auxiliary heating
switches off automatically. The auxiliary heating
does not switch on. Lack of fuel
The tank is less than one quarter full. The auxiliary heating
switches off automatically.
X
Refuel at the nearest gas station.
X Then, start the auxiliary heating several times until the fuel lines
are full. The auxiliary heating
does not switch on. The undervoltage protection circuit integrated in the control unit
switches off the

auxiliary heating because the on-board voltage is
less than 10 V.
X Have the alternator and battery checked. The auxiliary heating
does not switch on. The fuse is blown.
X
Replace the fuse ( Y page 239).
X Have the cause of the blown fuse determined at a qualified
specialist workshop. The auxiliary heating
does not switch on. The heater is faulty.
X
Have the auxiliary heating checked at a qualified specialist
workshop. The auxiliary heating is
overheated. The coolant level is too low.
X
Check the coolant level and top up if necessary (Y page 169). Central locking system
G
Warning
The operating safety of your vehicle could be jeopardized if maintenance work is carried out
incorrectly. As a

result, you could lose control of the vehicle and cause an accident. In addition,
the safety systems may no longer be able to protect you or others as they are designed to do.
Always have maintenance work carried out at a qualified specialist workshop. The qualified
specialist workshop must have the necessary specialist knowledge and tools to carry out the
work required. We recommend visiting an authorized Sprinter Dealer. In particular, work relevant
to safety or on safety-related systems must be carried out at a qualified specialist workshop. Troubleshooting
217
Practical advice Z

No. Consumer Fuse
rating 22 Brake system (ABS) 5 A
23 Starter motor 20 A
24 Engine components 10 A
25 12 V socket in the center
console 25 A
Fuse block F55/1
No. Consumer Fuse
rating 1 Left door control unit 25 A
2 Diagnostics socket 10 A
3 Brake system (valves) 25 A
4 Brake system (delivery
pump) 40 A
5 Terminal 87 (5) engine 7.5/10 A
6 Terminal 87 (6) engine 7.5/10 A
7 Headlamp cleaning
system 30 A
8 Anti-theft alarm system
(ATA) 15 A
9 Additional turn signal
module 10 A
Fuse block F55/2
No. Consumer Fuse
rating 10 Radio 15 A
11 Mobile phone 7.5 A
12 Blower, front/auxiliary
heating blower setting 1 30 A
13 Auxiliary heating digital
timer, radio receiver/
basic wiring DIN-
slot 7.5 A No. Consumer Fuse
rating 14 Seat heating 30 A
15 Unassigned —
16 Heating, rear-
compartment heating/
front-compartment air
conditioning/CD player 10 A
17 Motion detector/
convenience lighting 10 A
18 Rear-compartment air-
conditioning system 7.5 A
Prefuse box in the battery compartment in the
driver's footwell F59
No. Consumer Fuse
rating 1 Preglow relay/
secondary air pump 80/40 A
2 Air-conditioning system
cooling fan, cab 60/40 A
3 Signal acquisition and
actuation module
(SAM)/fuse-relay box
(SRB) 80 A
4 Auxiliary battery/
retarder 150 A242
Electrical systemPractical advice

No. Consumer Fuse
rating 15 Trailer recognition unit 25 A
16 Tire pressure monitor/
PARKTRONIC 7.5 A
17 PSM control unit 25 A
18 PSM control unit 25 A
Fuse block F55/5
No. Consumer Fuse
rating 19 Overhead control panel 5 A
20 Perimeter lamp 7.5 A
21 Rear window defroster 1 30 A
22 Rear window defroster 2 15 A
23 12 V socket rear left,
cargo compartment/
passenger
compartment/non-MB
body electrics 15 A
24 12 V socket under the
base of driver's seat 15 A
25 12 V socket rear right,
cargo compartment/
passenger compartment 15 A
26 Auxiliary heating 25 A
27 Heater booster system 25 A
Fuse block F55/6
No. Consumer Fuse
rating 28 Exhaust gas
aftertreatment – SCR
10
control unit 10 A
29 Unassigned — No. Consumer Fuse
rating 30 Brake booster 30 A
31 Rear-compartment
heating blower/sliding
door closing assistance,
left 30/15 A
32 Exhaust gas
aftertreatment – SCR
10
relay power supply 10 A
33 Sliding door closing
assistance, right 15 A
34 Exhaust gas
aftertreatment – SCR
10
heater 1 tank 15 A
35 Exhaust gas
aftertreatment – SCR
10
heater 2 hose 15 A
36 Exhaust gas
aftertreatment – SCR
10
heater 3 delivery pump 10 A
Batteries for the remote control
Notes on changing the batteries
G
Warning!
Batteries are toxic and contain caustic
substances. For this reason, keep batteries
out of the reach of children.
If a battery
has been swallowed, visit a doctor
immediately.
0040Environmental note Batteries contain toxic substances.
It is illegal to dispose of them with
household
waste. Batteries

must be
collected separately and be
10 Selective Catalytic Reduction. Batteries for the remote control
245
Practical advice Z