2021 MERCEDES-BENZ GLS SUV low oil pressure

#
Turn cap 1anti-clockwise and remo veit. #
Top up the engine oil. #
Replace cap 1and turn it clockwise until it
engages. #
Check the oil le vel again (/ page 367). Chec
Chec
king t
king t he coolant lev
he coolant lev el
el &
W
WARNING
ARNING Risk of injury due tomoving
parts
Components in the engine compartment may
continue torun or start unexpectedly even
when the drive system is switched o..
Obser vethefo llowing if you must open the
bonnet: #
Switch o. theve hicle. #
Neverto uch the danger zones sur round-
ing moving components, e.g. thero tation
area of thefa n. #
Remo vejewe llery and watches. #
Keep items of clo thing and hair away
from moving pa rts. &
W
WARNING
ARNING Risk of burns from hot compo-
nent parts in the engine compartment
Cer tain component parts in the engine com-
partment can be very hot, e.g. the engine, the
cooler and parts of theex haust system. #
Allow the engine tocool down and only
to uch component parts described in the
fo llowing. &
W
WARNING
ARNING Risk of scalding from hot cool-
ant
If yo u open the cap, you could be scalded. #
Let the mo tor cool down before opening
th e cap. #
When opening the cap, wear pr otective
glo ves and saf ety glasses. #
Open the cap slo wlytorelease pressure. Maintenance and care
369
369

Inf
Inf
or
ormation on using a high-pr
mation on using a high-pr essur
essure cleaner
e cleaner &
W
WARNING
ARNING Risk of an accident when using
high-pressure cleaners with round-spr ay
nozzles
The water jet can cause extern ally invisible
damage.
Components damaged in this wa y may un ex-
pectedly fail. #
Do not use a high-pressure cleaner with
ro und-spr aynozzles. #
Have damaged tyres or chassis parts
re placed immediatel y.To
avo id damage toyour vehicle, obser vethefo l-
lowing when using a high-pressure cleaner:
R The key is at a minimum dis tance of 3 m away
from theve hicle. Otherwise theta ilgate could
open unintentionall y.
R Maintain a distance of at least 30 cm tothe
ve hicle.
R V
V ehicles wit ehicles with decor h decorativ
ative f
e foil:
oil: Parts of your
ve hicle are co vered with a decorative foil. Maintain a distance of at least 70 cm between
th
efo il-co vered parts of theve hicle and the
nozzle of the high-pressure cleaner. Mo vethe
high-pressure cleaner nozzle around whilst
cleaning. The waterte mp erature of the high-
pressure cleaner must not exceed 60°C.
R Obser vethe information on the cor rect dis-
ta nce in the equipment manufacturer's oper-
ating inst ructions.
R Do not direct the nozzle of the high-pressure
cleaner directly at sensitive parts, such as
tyres, gaps, electrical components, batteries,
light sources and ventilation slits. W
W ashing t ashing t he v
he vehicle b
ehicle b y hand
y hand *
N NOOTE TE Engine damage due towa ter ing ress #
Take care not topoint thewa ter jet
directly towa rdsth e air inlet grille below
th e bonnet. obser
vethe legal requ irements, e.g. in a number
of countries, washing byhand is only permitted in
special lydesignated wash ba ys. #
Use a mild cleaning agent, e.g. car shampoo. #
Washtheve hicle with luk ewarm water using a
soT car sponge. When doing so, do not
ex pose theve hicle todirect sunlight. #
Carefully hose theve hicle o. with water and
dry using a chamois.
% Obser vethe no tes on the care of car parts
(/ page 376). N
No
ot
tes on paintw
es on paintw or
ork/matt
k/matt /nish
/nishpaintw
paintw or
ork care
k care To
avo id damaging the paintwork and inter fering
with the driving assistance systems, please
obser vethefo llowing no tes:
P
P aint
aint
R Insect remains: soak with insect remo ver and
ri nse o. the treated areas aTer wards.
R Bird droppings: soak with water and rinse o.
aTer wards.
R Tree resin, oils, fuels and greases: remo veby
ru bbing gently with a clo thsoaked in petro-
leum ether or lighter 0uid. 374
374
Main
tenance and ca re

5
Add 1 litre engine oil when next
re fuelling ............................................... 502
é ATTENTION ASSIST inoperati ve..... 471
é ATTENTION ASSIS T:Take a
break!.................................................... 471
: Automatic driving lights inoper-
ative...................................................... 448
_ Cannot fold 2nd seat row for-
wa rds See Owner's Manual .................... 460
Á Change key batteries .................... 446
J Check brake 0uid le vel.................. 470
ï Check trailer hitch lock (white
display message) .................................... 453
h Check tyre(s) ................................ 496
! Clean the fuel /lter....................... 463
Á Compressor is cooling .................. 486
ÿ Coolant Stop vehicle Switch
engine o............................................... 462
! currently una vailable See Own-
er's Manual............................................4 87÷
currently una vailable See Own-
er's Manual............................................4 88
5 Engine oil le vel cannot be meas-
ured....................................................... 503
5 Engine oil le velRe duce oil le vel..... 502
5 Engine oil le velSt op vehicle
Switch engine o.................................... 502
5 Engine oil pressure Stop Switch
o. engine.............................................. 503
ä Fault Drive at max. 80 km/h
...................................................... 483, 484
ä Fault Stop.................................... .484
6 Front leT malfunction Consult
wo rkshop (e xample)...............................4 43
& inoperative Battery low................. 451
& inoperative Refuel vehicle............. .451
& inoperative See Owner's Man........ 451
! inoperative See Owner's Manual.. .488
÷ inoperative See Owner's Manual.. .489
T inoperative See Owner's Manual.. .490 G
Inoperative................................... 491
î inoperative....................................4 75
: Intelligent Light System inopera-
tive........................................................ 449
Á Key being initialised Please wait.... 447
Á Key not de tected (red display
message).............................................. .447
Á Key not de tected (white display
message).............................................. .446
: LeT dipped beam (e xample).......... 448
6 LeT windowbag malfunction
Consult workshop (e xample).................. 443
 Lowe ring....................................... 485
: Malfunction See Owner's Man-
ual ......................................................... 448
î Max. speed 40 km/h .................... 476
ð Maximum speed exceeded ............ 475
î Not possible in cur rent drive
prog ram................................................. 475
Ø .................................................... 499 Index
527 527