Mercedes Benz Gl service: key facts
- Oil service every 15,500 miles or 1 year
- Basic service costs £180–£450 depending on garage
- Automatic transmission fluid: £350–£500 — don't skip this one
- 2 generations from 2006 to 2019
- 8 tracked service items across routine, major, and periodic schedules
Routine service items
These are the items covered in a standard service. Most garages include oil, oil filter and a basic inspection. The rest are typically checked or replaced on a schedule.
| Service item | Interval | Typical cost |
|---|---|---|
|
Engine oil and filter
Mercedes ASSYST system determines actual interval based on driving conditions, typically 10,000-15,500 miles.
X164, X166
|
15,500 miles or 1 year |
£180–£280
Dealer: £320–£450
|
|
Air filter
Manufacturer interval 30,000 miles. Inspect at each service - may need replacement sooner in dusty conditions. Dirty filter reduces power and increases fuel consumption on these heavy vehicles.
X164, X166
|
30,000 miles or 3 years |
£45–£75
Dealer: £85–£120
|
|
Cabin pollen filter
Replace annually or 15,000 miles. Blocked filter causes poor air conditioning performance and musty odours. Check air conditioning drain tubes for blockage during replacement.
X164, X166
|
15,000 miles or 1 year |
£35–£55
Dealer: £65–£95
|
|
Fuel filter
Diesel only - 30,000 mile interval. Includes water separator drain. Poor fuel quality can block filter sooner. Blocked filter causes power loss and potential injection system damage.
X164, X166
|
30,000 miles or 3 years |
£120–£180
Dealer: £220–£320
|
Major service items
These are the big-ticket items. Miss them and you risk engine or gearbox damage. The costs are higher but the consequences of skipping are much worse.
| Service item | Interval | Typical cost |
|---|---|---|
|
Automatic transmission fluid
Mercedes claims lifetime fill but specialists recommend 80,000-mile changes on 7G-Tronic gearboxes.
X164, X166
|
80,000 miles or 8 years |
£350–£500
Dealer: £650–£900
|
Periodic maintenance
Items that don't need doing at every service but should be on your radar at the right mileage or age.
| Service item | Interval | Typical cost |
|---|---|---|
|
Brake fluid
Mandatory 2-year replacement regardless of mileage. Use DOT4 brake fluid meeting MB 331.0 specification. Critical on these heavy vehicles with complex brake systems including hill descent control.
X164, X166
|
2 years |
£120–£180
Dealer: £220–£300
|
|
Coolant flush
Manufacturer interval 6 years or 90,000 miles. Use MB 325.0 specification coolant only. Flush includes thermostat replacement. Essential to prevent cooling system corrosion on aluminium engines.
X164, X166
|
90,000 miles or 6 years |
£200–£350
Dealer: £400–£600
|
|
DPF forced regeneration interval
Automatic regeneration every 600 miles approximately during normal driving.
X164, X166
|
600 miles |
£80–£120
Dealer: £150–£220
|
Check a Mercedes Benz Gl's service history
Enter a reg to see franchised dealer service records — dates, mileage, and work done at every visit.
Check service history£6.99 · Full refund if no records found
Related
Mercedes Benz Gl service FAQs
How often should a Mercedes Benz Gl be serviced?
A Mercedes Benz Gl should have an oil service every 15,500 miles or 1 year, whichever comes first. Mercedes ASSYST system determines actual interval based on driving conditions, typically 10,000-15,500 miles.
How much does a Mercedes Benz Gl service cost?
A basic service at an independent garage typically costs £180–£280. Main dealer servicing is usually £320–£450. Major items like timing belts or gearbox services cost significantly more.
Can I service a Mercedes Benz Gl at an independent garage?
Yes. Under UK consumer law, using an independent garage does not void your manufacturer warranty, provided they use parts meeting the manufacturer's specification and follow the correct schedule. However, independent services won't appear in the franchised dealer digital records.