Steering lock (ESL / ELV) failure
usually 60,000–200,000 km · Medium risk
Signs: Key turns but the car won't start
Fix: Replace ESL (updated part)
€300–800
Common faults, service intervals and costs
Mercedes-Benz GLK (X204)
2008–2015
4
engines covered
14
known faults
7
official recalls
Enter your VIN and mileage and get a plan built for your exact engine and gearbox.
The Mercedes-Benz GLK (X204) was built from 2008 to 2015.
For this generation we cover 4 engines and 14 known faults, each with the mileage range where it usually appears.
The most expensive known risk is Timing chain guides (early engines): it usually appears at 150,000–250,000 km and costs €1,500–3,000 to fix.
Engines
| Engine | Fuel | Timing drive | Oil |
|---|---|---|---|
| 2.5 / 3.0 / 3.5 V6 & V8 (Mercedes M272 / M273) | Petrol | Chain | 5W-30 / 5W-40 · MB 229.5 · ~8.0 L · every 15,000 km |
| 2.2 CDI (Mercedes OM646) | Diesel | Chain | 5W-30 / 5W-40 · MB 229.31 / 229.51 · ~6.5 L · every 15,000 km |
| 2.1 CDI (Mercedes OM651) | Diesel | Chain | 5W-30 · MB 229.51 / 229.52 · ~6.5 L · every 15,000 km |
| 3.0 CDI V6 (Mercedes OM642) | Diesel | Chain | 5W-30 · MB 229.51 · ~8.0 L · every 15,000 km |
Faults typical of this model
Faults by engine
2.5 / 3.0 / 3.5 V6 & V8 (Mercedes M272 / M273)
Intake manifold flap failure
usually 100,000–200,000 km · Medium risk
Signs: Engine light, power loss
Fix: Replace intake manifold
€500–1,200
Thermostat / coolant leaks
usually 100,000–200,000 km · Wear part
Signs: Slow warm-up, coolant loss
Fix: Replace thermostat
€150–400
2.2 CDI (Mercedes OM646)
Injector copper seals ('black death')
usually 100,000–250,000 km · High risk
Signs: Ticking, soot around injectors, diesel smell in the cabin
Fix: Replace seals and hold-down bolts early
€200–1,200
Glow plugs seized
usually 150,000–250,000 km · Medium risk
Signs: Hard cold start; plugs snap on removal
Fix: Replace with care
€200–900
Oil cooler / filter housing seals
usually 150,000–250,000 km · Medium risk
Signs: Oil leak down the block
Fix: Reseal
€300–700
EGR / swirl flap actuator
usually 120,000–220,000 km · Medium risk
Signs: Limp mode
Fix: Clean or replace
€300–900
2.1 CDI (Mercedes OM651)
Piezo injectors (2009–2011)
usually 60,000–140,000 km · High risk
Signs: Rough running, knocking, no-start
Fix: Replace injectors (check campaign)
€1,000–2,500
Timing chain stretch
usually 200,000–280,000 km · Medium risk
Signs: Correlation codes, rattle
Fix: Replace chain
€1,200–2,200
EGR / DPF
usually 150,000–220,000 km · Medium risk
Signs: Limp mode, DPF light
Fix: Clean or replace
€300–1,500
3.0 CDI V6 (Mercedes OM642)
Oil cooler seals (engine valley)
usually 120,000–220,000 km · High risk
Signs: Oil leak at the back of the engine / bellhousing
Fix: Reseal the oil cooler (intake off)
€1,000–2,000
Intake swirl flaps / actuator
usually 120,000–220,000 km · Medium risk
Signs: Engine light, limp mode
Fix: Replace manifold or actuator
€600–1,500
EGR / DPF
usually 150,000–250,000 km · Medium risk
Signs: Limp mode
Fix: Clean or replace
€400–1,800
Timing chain guides (early engines)
usually 150,000–250,000 km · Medium risk
model years 2005–2010 only
Signs: Rattle
Fix: Replace guides and chain
€1,500–3,000
Gearboxes
5G / 7G / 9G-Tronic
Conductor plate / speed sensor (5G / 7G-Tronic)
usually 100,000–220,000 km · Medium risk
Signs: Stuck in gear, limp mode, harsh shifts
Fix: Replace the conductor plate; fluid every 60–100,000 km
€500–1,500
Scheduled service
Intervals and typical prices for the 2.5 / 3.0 / 3.5 V6 & V8 (Mercedes M272 / M273) engine. Other engines differ in oil, timing drive and some filters; the app gives the exact plan.
| Item | Interval | Typical price |
|---|---|---|
| Transfer case / rear differential oilTransmission | every 80,000 km | €60–160 |
| Engine oil + oil filterEngine | every 15,000 km or every 12 months | €70–150 |
| Cabin (pollen) filterClimate | every 15,000 km or every 12 months | €15–40 |
| Brake fluidBrakes | every 24 months | €50–95 |
| A/C service (regas + desiccant)Climate | every 24 months | €70–150 |
| Air filterEngine | every 30,000 km or every 24 months | €15–45 |
| Spark plugsIgnition | every 60,000 km or every 48 months | €50–160 |
| AWD coupling (Haldex) oil + filterTransmission | every 60,000 km or every 36 months | €60–150 |
| Automatic transmission fluidTransmission | every 90,000 km | €200–450 |
| Auxiliary (serpentine) beltEngine | every 120,000 km | €70–180 |
| Coolant replacementCooling | every 150,000 km or every 96 months | €70–150 |
| Timing chain inspection (listen on cold start)Engine | every 150,000 km | €0–120 |
| Front brake padsBrakes | usually at 30,000–60,000 km | €60–150 |
| Front brake discs + padsBrakes | usually at 60,000–120,000 km | €150–320 |
| Rear brake padsBrakes | usually at 50,000–90,000 km | €50–130 |
| Tyres (set of 4)Wheels | usually at 40,000–60,000 km | €320–700 |
| Wiper bladesBody | checked at service | €20–50 |
| 12V batteryElectrical | checked at service | €100–220 |
Owner complaints in the US
Which systems owners reported to the US agency NHTSA and at what mileage. Complaints are not confirmed faults and some relate to recalls. Sample: 254 complaints.
Official recalls
Recalls the manufacturer published in the United Kingdom for this model (7). The same recalls usually apply across Europe. Ask an authorised dealer to check by VIN whether your car is affected and whether the work has been done.
- Steering On affected vehicles the aluminium bolts of the steering gear could corrode and break due to the intrusion of moisture.20/02/2023 · R/2023/023
- Airbag The passenger air bag may not deploy as specified01/06/2022 · R/2022/125
- Airbag The passenger air bag may not deploy as specified01/06/2022 · R/2022/124
- Airbag Takata airbag might not deploy as specified08/11/2021 · R/2021/358
- Airbag Takata airbag might not deploy as specified08/11/2021 · R/2021/359
- Engine / loss of power Software update required to improve emissions18/10/2019 · R/2019/307
- Engine / loss of power Software update required to improve emissions14/08/2019 · R/2019/272
Sources and notes
Faults, intervals and prices are indicative and collected from public sources and owner experience; always rely on the service book and a qualified workshop. Test statistics: DVSA – Anonymised MOT tests and results, Open Government Licence v3.0. Owner complaints: NHTSA ODI (public domain). Recalls: DVSA Vehicle Safety Branch Recalls Database, OGL v3.0. Brand and model names are trademarks of their owners and are used only to describe the vehicles.
Updated 07/10/2026