2019 MERCEDES-BENZ GLA overheating

take advantage of engine braking. For thisyou must first activate manual gearshifting.This helps you to avoid overheating thebrakes and wearing them out excessively.
When you take advantage of engine braking,it is possible that a drive wheel will notrotate for some time, e.g. on a slippery roadsurface. This could cause damage to thedrive train. This type of damage is not cov-ered by the Mercedes-Benz warranty.
Briefly depressing the accelerator pedal ondownhill gradients while the manual drive pro-gramMis temporarily activated: the automatictransmission may switch to the last activeautomatic drive programEorS. The automatictransmission may shift to a higher gear. Thiscan reduce the engine's braking effect.
Heavy and light loads
GWARNING
If you rest your foot on the brake pedal
while driving, the braking system can over-
heat. This increases the stopping distance
and can even cause the braking system to
fail. There is a risk of an accident.
Never use the brake pedal as a footrest.
Never depress the brake pedal and the
accelerator pedal at the same time.
!Depressing the brake pedal constantlyresults in excessive and premature wear tothe brake pads.
If the brakes have been subjected to a heavyload, do not stop the vehicle immediately.Drive on for a short while. This allows the air-flow to cool the brakes more quickly.
Wet roads
If you have driven for a long time in heavy rainwithout braking, there may be a delayed reac-tion from the brakes when braking for the firsttime. This may also occur after the vehicle hasbeen washed or driven through deep water.
You have to depress the brake pedal morefirmly. Maintain a greater distance from thevehicle in front.
After driving on a wet road or having the vehi-cle washed, brake firmly while paying attentionto the traffic conditions. This will warm up the
brake discs, thereby drying them more quicklyand protecting them against corrosion.
Limited braking performance on salt-
treated roads
If you drive on salted roads, a layer of salt resi-due may form on the brake discs and brakepads. This can result in a significantly longerbraking distance.
RIn order to prevent any salt build-up, applythe brakes occasionally while paying atten-tion to the traffic conditions.
RCarefully depress the brake pedal and thebeginning and end of a journey.
RMaintain a greater distance to the vehicleahead.
Servicing the brakes
!The brake fluid level may be too low, if:
Rif the red brake warning lamp lights up inthe instrument cluster and
Ryou hear a warning tone while the engineis running
Observe additional warning messages in themultifunction display.
The brake fluid level may be too low due tobrake pad wear or leaking brake lines.
Have the brake system checked immedi-ately. Consult a qualified specialist work-shop to arrange this.
!A function or performance test should onlybe carried out on a 2-axle dynamometer. Ifyou wish to operate the vehicle on such adynamometer, please consult a qualifiedspecialist workshop in advance. You couldotherwise damage the drive train or thebrake system.
!As the ESP®system operates automati-cally, the engine and the ignition must beswitched off (the SmartKey must be in posi-tion

RActivate DSR. If this is not sufficient, brakegently. When doing so, make sure that thevehicle is facing in the direction of the lineof fall.
RCheck that the brakes are working normallyafter a long downhill stretch.
Off-road ABS is activated when the off-roadprogram is selected.
At speeds below 18 mph (30 km/h), the frontwheels lock cyclically during braking. The dig-ging-in effect achieved in the process reducesthe stopping distance on off-road terrain. Thesteerability of the vehicle is considerablyreduced if the wheels lock.
Driving systems
Cruise control
General notes
Cruise control maintains a constant roadspeed for you. It brakes automatically in orderto avoid exceeding the set speed. On long andsteep downhill gradients, especially if the vehi-cle is laden, you must select a low gear ingood time. You need to shift manually usingthe steering wheel paddle shifters beforehand.By doing so, you will make use of the brakingeffect of the engine. This relieves the load onthe brake system and prevents the brakesfrom overheating and wearing too quickly.
When the engine is running, you can use thecruise control lever to limit the speed to anyspeed between 20 mph (30 km/h) and thetechnically permitted maximum speed of thevehicle.
Use cruise control if road and traffic condi-tions make it appropriate to maintain a steadyspeed for a prolonged period.
The speed indicated in the speedometer maydiffer slightly from the speed stored.
Important safety notes
If you fail to adapt your driving style, cruisecontrol can neither reduce the risk of an acci-dent nor override the laws of physics. Cruisecontrol cannot take into account the road,traffic and weather conditions. Cruise controlis only an aid. You are responsible for the dis-tance to the vehicle in front, for vehicle speed,
for braking in good time and for staying in yourlane.
Do not use cruise control:
Rin road and traffic conditions which do notallow you to maintain a constant speed, e.g.in heavy traffic or on winding roads
Ron slippery road surfaces. Braking or accel-erating could cause the drive wheels to losetraction and the vehicle could then skid
Rin poor visibility, e.g. due to fog, heavy rainor snow
If there is a change of drivers, advise the newdriver of the speed stored.
Cruise control lever
CActivates or increases speed
DActivates or reduces speed

sound and the distance warning lamp will lightup in the instrument cluster. Brake immedi-ately in order to increase the distance to thevehicle in front or take evasive action providedit is safe to do so.
Active Distance Assist DISTRONIC operates inthe speed range between 0 mph (0 km/h) and120 mph (200 km/h).
Change into a lower gear in good time on longand steep downhill gradients. This is especiallyimportant if the vehicle is laden. By doing so,you will make use of the braking effect of theengine. This relieves the load on the brake sys-tem and prevents the brakes from overheatingand wearing too quickly.
Do not use Active Distance Assist DISTRONICon roads with steep gradients.
For Active Distance Assist DISTRONIC toassist you when driving, the radar sensor sys-tem must be operational.
As Active Distance Assist DISTRONIC trans-mits radar waves, it can resemble the radardetectors of the responsible authorities. Youcan refer to the relevant chapter in the Opera-tor's Manual if questions are asked about this.
iUSA only: This device has been approvedby the FCC as a "Vehicular Radar System".The radar sensor is intended for use in anautomotive radar system only. Removal,tampering, or altering of the device will voidany warranties, and is not permitted by theFCC. Do not tamper with, alter, or use in anynon-approved way.
Any unauthorized modification to this devicecould void the user's authority to operatethe equipment.
iCanada only: This device complies withRSS-210 of Industry Canada. Operation issubject to the following two conditions:
1. This device may not cause interference,and
2. This device must accept any interferencereceived, including interference that maycause undesired operation of the device.
Removal, tampering, or altering of thedevice will void any warranties, and is notpermitted. Do not tamper with, alter, or usein any non-approved way.
Any unauthorized modification to this devicecould void the user's authority to operatethe equipment.
Important safety notes
GWARNING
Active Distance Assist DISTRONIC does not
react to:
Rpeople or animals
Rstationary objects in the road, e.g. stop-
ped or parked vehicles
Roncoming vehicles and crossing traffic
As a result, Active Distance Assist
DISTRONIC may neither give warnings nor
intervene in such situations. There is a risk
of an accident.
Always pay careful attention to the traffic
situation and be ready to brake.
GWARNING
Active Distance Assist DISTRONIC cannot
always clearly identify other road users and
complex traffic situations.
In such cases, Active Distance Assist
DISTRONIC can:
Rgive an unnecessary warning and then
brake the vehicle
Rneither give a warning nor intervene
Raccelerate or brake unexpectedly
There is a risk of an accident.
Continue to drive carefully and be ready to
brake, especially if Active Distance Assist
DISTRONIC warns you.
GWARNING
Active Distance Assist DISTRONIC brakes
your vehicle with up to 50% of the maximum
possible deceleration. If this deceleration is
not sufficient, Active Distance Assist
DISTRONIC alerts you with a visual and
acoustic warning. There is a risk of an acci-
dent.
Adjust your speed in these cases and main-
tain sufficient distance.
Apply the brakes yourself and/or take eva-
sive action.
Driving systems159
Driving and parking
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For a list of approved engine oils and oil filters,consult an authorized Mercedes-Benz Center.Or visit the websitehttp://bevo.mercedes-benz.com.
The table shows which engine oils have beenapproved for your vehicle.
ModelMB-Freigabe orMB-Approval
All models229.5
Use only SAE 0W-40 or SAE 5W-40 engine oilsfor Mercedes-AMG vehicles.
iMB approval is indicated on the oil con-tainers.
Filling capacities
The following values refer to an engine oilchange, including the oil filter.
ModelCapacity
Mercedes‑AMG vehicles5.8 USqt (5.5 l)
All other models5.9 USqt (5.6 l)
Additives
!Do not use any additives in the engine oil.This could damage the engine.
Brake fluid
GWARNING
The brake fluid constantly absorbs moisture
from the air. This lowers the boiling point of
the brake fluid. If the boiling point of the
brake fluid is too low, vapor pockets may
form in the brake system when the brakes
are applied hard. This would impair braking
efficiency. There is a risk of an accident.
You should have the brake fluid renewed at
the specified intervals.
When handling brake fluid, observe the impor-tant safety notes on service products(Ypage 334).
The brake fluid change intervals can be foundin the Maintenance Booklet.
Only use brake fluid approved by Mercedes-Benz in accordance with MB-Freigabe or MB-Approval 331.0.
Information about approved brake fluid can beobtained at any qualified specialist workshopor on the Internet athttp://bevo.mercedes-benz.com.
iHave the brake fluid regularly replaced at aqualified specialist workshop and thereplacement confirmed in the MaintenanceBooklet.
Coolant
Important safety notes
GWARNING
If antifreeze comes into contact with hot
components in the engine compartment, it
may ignite. There is a risk of fire and injury.
Let the engine cool down before you add
antifreeze. Make sure that antifreeze is not
spilled next to the filler neck. Thoroughly
clean the antifreeze from components
before starting the engine.
!Only add coolant that has been premixedwith the desired antifreeze protection. Youcould otherwise damage the engine.
You can find additional notes on the coolantin the following places:
Rin the Mercedes-Benz Specifications forService Products, MB BeVo 310.1
-on the Internet athttp://bevo.mercedes-benz.com
-on the Mercedes-Benz BeVo app
Ra qualified specialized workshop
!Always use a suitable coolant mixture,even in countries where high temperaturesprevail.
Otherwise, the engine cooling system is notsufficiently protected from corrosion andoverheating.
iHave the coolant regularly replaced at aqualified specialist workshop and thereplacement confirmed in the MaintenanceBooklet.
Service products and filling capacities337
Technical data
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