2018 AUDI A4 fuel cap release

fast acceleration) and have the malfunction cor­rected. See an authorized Audi dealer or
authorized Audi Service Facility .
The electronic speed limiter may be faulty if the
indicator light turns on. For additional informa­
tion, see
¢ page 102, Electronic speed limiter .
The MIL indicator light may also turn on if the
fuel filler cap is not closed correctly
¢page 317.
On-Board Diagnostics
Fig. 22 Location of Data Li nk Con nec tor (DLC )
On-Board Diagnostics monitors the components
of your em ission control system. Each monitored
component in your eng ine system has been as­
signed a code. In case of a ma lfunction, the com­
ponent will be identified and the fault stored as a
code in the control module memory.
The MI L light may also illuminate if there is a
leak in the on -board fuel vapor recovery system.
If the light illuminates after a refueling, stop the
vehicle and make sure the fuel filler cap is prop­ erly closed (only vehicles with gasoline engine)
¢ page 317 .
In order to make an accurate diagnosis, the stor­
ed data can only be displayed using special diag­ nostic equipment (generic scan tool for OBD) .
In order to connect the specia l diagnostic equip­
ment, push the plug into the Data Link Connector
(DLC). The DLC is located to the right of the hood
release¢ fig. 22.
a Your authorized Audi dealer or qualif ied work-al
;:::: shop can interpret the code and perform the nee-
" ~ essary repair . 0 0
~ al
Cockpit overview
A WARNING
--
Do not use the diagnostic connector for per­
sonal use. Incorrect usage can cause malfunc­
tions, which can increase the risk of a colli­
sion!
Indicator lights
Description
The indicator lights in the instrument cluster
blink or turn on. They indicate functions or mal­
functions.
Messages may appear with some indicator lights.
A warn ing s ignal will sound at the same time.
The indicator lights and messages in the instru­
ment cluster display can be covered by other dis­
plays. To show them again, select the second tab
with the mult ifunct ion steer ing
wheel ¢ page 13.
If there are several malfunctions, you can display
them one at a time using the thumbwheel.
Some indicator lights in the display can display in
several co lors.
it Central indicator light
If the. or d indicator light turns on, check
the message in the instr ument cluster.
Overview
Some indicator lights turn on briefly as a function
check when you sw itch the ignition on. These sys ­
tems are marked with
a./ in the fo llowing tab les.
If one of these indicator lights does not turn on,
there is a malfunction in that system.
Your vehicle has either a monochrome display or
a multicolored display, depending on vehicle
equipment. Some indicator lights appear white
on a monochrome display .
The. or Q central
indicator light turns on at the same time to indi-
cate the priority of these indicator lights.
..,.
25

Index
Rearview camera
re fer to Parking systems . . . . . . . . . . 137, 138
Rear window defogger . . . . . . . . . . . . . . . . . . 78
Rear window sh ade . . . . . . . . . . . . . . . . . . . . .
60
Rear window washer system . . . . . . . . . . . . . 60
REAR (button) . . . . . . . . . . . . . . . . . . . . . . . . . 78
Recircu lation mode (automatic climate con-
t rol) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78
Recuperation . . . . . . . . . . . . . . . . . . . . . . . . . 17
Refueling ....... ........... ........ .. 317
Fuel filler door emergency release 319
Remote control
refer to Remote control key . . . . . . . . . . . . 38
Remote control key . . . . . . . . . . . . . . . . . . . . 38
Remote control operation Garage door opener (Homelink) . . . . . . . . . 52
Remote locking and unlocking
Audi connec t vehicle control . . . . . . . . . . . 199
Removing the caps (wheel bolts) . . . . . . . . . 363
Repair manuals . . . . . . . . . . . . . . . . . . . . . . . 383
Repairs Airbag system . . . . . . . . . . . . . . . . . . . . . . 286
Replacement key . . . . . . . . . . . . . . . . . . . . . . 38
Replacing Light bulbs . . . . . . . . . . . . . . . . . . . . . . . . . 373
Replacing wiper b lades . . . . . . . . . . . . . . 62, 63
Reporting Safety Defects . . . . . . . . . . . 261, 262
Reset
refer to Restart (MMI) . . . . . . . . . . . . . . . . 253
Reset button (trip odometer) . . . . . . . . . . . . 12
Resetting the trip odometer . . . . . . . . . . . . . 12
Residual heat (automatic climate control) . . 79
Resta rt (MMI) . . . . . . . . . . . . . . . . . . . . . . . . 253
Retractor . . . . . . . . . . . . . . . . . . . . . . . . . . . . 266
Reverse gea r . . . . . . . . . . . . . . . . . . . . . . . . . . 91
Reversible cargo floor . . . . . . . . . . . . . . . . . . 7 4
Rewinding (audio/video file) . . . . . . . . . . . . 236
Right control button . . . . . . . . . . . . . . . . . . . . 14
Rims ..... .. .. .... ... ... ..... .. .. .. . 349
Clean ing . . . . . . . . . . . . . . . . . . . . . . . . . . . 355
Ringtone settings . . . . . . . . . . . . . . . . . . . . . 1 85
Roaming
refer to Data connection . . . . . . . . . . . . . . 1 95
Roof emergency operation . . . . . . . . . . . . . . . 50
396
Roof rack . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 4
Roof load . . . . . . . . . . . . . . . . . . . . . . . . . . .
7 4
also ref er to Roof rack . . . . . . . . . . . . . . . . . 7 4
Route criteria . . . . . . . . . . . . . . . . . . . . . . . . 213
Route guidan ce
refer to Navigation . . . . . . . . . . . . . . . . . . . 204
Running direc tion (tires)
s
Safe driving habits
Safety 366
254
Airbag system . . . . . . . . . . . . . . . . . . . . . . 271
Belts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 263
Cargo . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 259
Correct seating position . . . . . . . . . . . . . . 255
P edal area . . . . . . . . . . . . . . . . . . . . . . . . . . 259
T ele phone. . . . . . . . . . . . . . . . . . . . . . . . . . 175
Safety belt height adjustment . . . . . . . . . . . 268
Safety belt position . . . . . . . . . . . . . . . . . . . 267
Safety belt height adjustment . . . . . . . . . 268
Safety belts worn by pregnant women . . . 268
Safety belt pretensioner Serv ice and d isposal. . . . . . . . . . . . . . . . . . 270
Safety be lts . . . . . . . . . . . . . . . . . . . . . . 263, 266
Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . 356
Danger to passengers who do not w ear a
saf ety b elt . . . . . . . . . . . . . . . . . . . . . . . . . 264
Fas tening . . . . . . . . . . . . . . . . . . . . . . . . . . 266
Improperly worn . . . . . . . . . . . . . . . . . . . . 269
Not worn . . . . . . . . . . . . . . . . . . . . . . . . . . 264
Safety belt position . . . . . . . . . . . . . . . . . . 267
Safety instructions . . . . . . . . . . . . . . . . . . . 265
Securing child safety seats . . . . . . . . . . . .
306
Special considerat ions for pregnant wom -
en .......... ..... .. ............... 268
Unfastening . . . . . . . . . . . . . . . . . . . . . . . . 268
Warning/indicator light . . . . . . . . . . . . . . 263
Worn p roperly . . . . . . . . . . . . . . . . . . . . . . 265
Safety belt warning light . . . . . . . . . . . . . . . 263
Safety instructions for side curtain airbags . . . . . . . . . . . . . . . 294
for using child safety seats . . . . . . . . . . . . 299
for using safety belts . . . . . . . . . . . . . . . . . 265
Monitoring the Advanced Airbag System 285
Saving fuel Energy consumers . . . . . . . . . . . . . . . . . . . . 18
Recuperation . . . . . . . . . . . . . . . . . . . . . . . . 17