Mercedes-Benz GLS350 BlueTec / d 4MATIC X1663.0 litre · 190 kW

Nov 2015 – Apr 2019 · SUV · Diesel · 166.824

Oil, coolant and a checklist for your next service.

Silver Mercedes-Benz GLS X166, generated side-profile illustration

Oil & coolant

Engine oil capacity

8 L

  • Oil change with filter

Coolant capacity

11.5 L

  • Engine cooling system
  • Service refill

Engine oil specification

MB 229.52

Coolant specification

MB 325.6 or MB 326.6

  • MB 325.6: concentrate, dilute before use
  • MB 326.6: premixed, do not add water

Do not mix different coolant types. Let the cooling system cool before opening the reservoir. Check the level after filling. The capacity shown is not a top-up amount.

Engine & gearbox

Engine code

OM 642.826

  • 2,987 cc · 6 cylinders · 24 valves
  • Turbocharged · direct injection
  • Bore × stroke 83 × 92 mm
  • Compression 18:1

Drive

All-wheel drive

Automatic gearbox fluid

9 L

  • 7G-TRONIC (722.9)
  • Approval MB 236.14 or MB 236.15

Automatic gearbox fluid

10 L

  • 9G-TRONIC (725.0)
  • Approval MB 236.17

Rear axle oil

MB 235.0

Brake fluid

DOT 4

The gearbox figure is the quantity listed for the gearbox. A fluid change usually takes less, so fill to the correct level rather than to the figure. Two gearboxes are listed for this car, so check which one yours has before buying fluid.

When to service & replace parts

Replacement intervals

Part or fluidWhen to replace it
Engine oil and oil filterAt each Service A and Service B

Replace according to wear

Brake pads, discs, tyres and wipers do not share a fixed replacement mileage.

Brake pads and discs

Check pad thickness and disc condition. Replace when they reach the wear limit.

Wiper blades

Replace blades that leave streaks, skip across the glass or have damaged rubber.

Tyres

Check tread, damage and cracking, and correct the pressures.

Service checklist

Service A and Service B alternate, normally once a year. Follow the time or kilometres remaining on your dashboard, whichever comes first. Extra work can fall due with either service.

Service A

When Service A is due on the dashboard

Replace

Check & maintain

Service B

When Service B is due on the dashboard

Replace

Check & maintain

Tick off jobs as you go. Your ticks are saved on this device.

Brake discs

AxleDisc sizeTypeMinimum thicknessApplies to
Front 350 × 32 mm Vented 29.4 mm Without sports package
Front 375 × 36 mm Vented 33.4 mm With sports package
Front 390 × 36 mm Vented 34 mm With sports brake system
Rear 345 × 22 mm Vented 19.4 mm All versions

Size is diameter × thickness. Replace a disc before it wears to its minimum thickness, which is also marked on the disc itself. Where two sizes are listed for one axle, the car's equipment decides which it has: measure the disc to be sure.

Wheels & tyres

Stud pattern

5 × 112

  • Number of bolts × circle diameter (mm)

Wheel bolts

M14 × 1.5

  • 17 mm hex head

Bulbs

LightBulbApplies to
Headlight (low beam)H7 · 55 WHalogen
High beamH7 · 55 WHalogen
Front fog lightH7 · 55 W—
Daytime running lightH7 · 55 W—

Check the bulb you take out before buying a new one. Halogen, xenon and LED headlights use different bulbs, and LED lights usually have no bulb to replace.

Battery

Case size (L × W × H)CapacityCold crankingShare of listings
353 × 175 × 190 mm 95 Ah 850 A (EN) 75%

The main battery sizes listed for this car, most common first. The right one depends on the car's equipment, such as start-stop, so match the size, capacity and type printed on the battery you are replacing.

Engine, gearbox, brake, wheel, tyre, bulb, battery and plug details are taken from the parts makers' listings for this exact vehicle. Where those listings disagree, only the clear majority is shown.

Parts for this car

46 in stock

Every part we stock that is listed to fit the GLS350 BlueTec / d 4MATIC X166 3.0 litre · 190 kW. Build date and factory options can still affect fitment, so check the fitment table on a part before you order.

Brakes12 parts
Filters3 parts
Wipers1 part
Engine & cooling7 parts
Suspension & steering14 parts
Transmission & driveline2 parts
Electrical1 part
Exhaust1 part
Body & interior5 parts

Keep a record of this service

Print the specifications and checklist with your registration, VIN, mileage and the products you used.

Prepare service record

Your printable service record

Add your details, or leave the fields blank to fill in by hand. Your checklist ticks are included, and longer notes get an extra page. Details stay on this device.

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