2017 — 2020
2.3L OM699 DE23 LA Bi-Turbo Diesel (X 250 d) - 140kW 4MATIC
Diesel
Listen closely while accelerating from a standstill | Description: While driving, pay attention to any shuddering or hesitation during gear changes, as some owners have noted that the 7-speed automatic transmission can occasionally be a bit temperamental if the fluid hasn't been serviced regularly.
Observe the dashboard display during cold starts | Description: Check this by ensuring the glow plug warning light cycles off correctly; the OM699 engine can sometimes experience minor issues with glow plug relays in cooler climates, which might cause a slightly lumpy idle on very cold mornings.
Inspect the front wheel arches and steering rack boots | Description: Inspect this by turning the steering wheel to full lock in both directions while parked to check for any visible weeping or grease leaks around the CV joints or rack gaiters, as these components work quite hard on heavier 4WD utes.
Examine the rear differential casing for oil dampness | Description: Check this by looking underneath the rear axle housing; occasionally, minor oil weeping can occur at the pinion seal, which is worth noting for your future maintenance plan.
Consider a proactive transmission fluid flush and filter change to keep the 7-speed automatic shifting smoothly.
A common time to inspect the auxiliary drive belt and tensioner for any signs of cracking or fatigue.
Recommended interval to check the suspension bushings and verify that the DPF system is regenerating correctly during longer highway runs.
Prioritize regular engine oil and genuine Mercedes-specified filter changes every 10,000km rather than stretching the interval.
Ensure the AdBlue tank is topped up with quality fluid to prevent any sensor-related dashboard alerts.
Periodically clear out the air conditioning drain lines to prevent any potential dampness in the cabin footwells.
Keep an eye on the coolant levels; use only the correct Mercedes-approved coolant to protect the longevity of the cooling system.
Regularly lubricate door hinges and tailgate mechanisms to keep everything operating quietly in our salt-air environment.
Estimated repair costs if issues arise
If you primarily use the vehicle for short city trips, the DPF may eventually require a forced regeneration or professional cleaning to maintain optimal fuel efficiency.
Depending on the car's history and whether it has been used for towing, you might eventually need to budget for replacing front-end suspension bushings to keep the ride feeling firm and precise.
If this component needs attention in the future, it is a good idea to budget for quality rotors and pads to ensure your stopping power remains consistent, especially when carrying a load.
Noticed something inaccurate or missing?Suggest an edit→
Disclaimer: This report is generated with the assistance of AI analysis based on verified automotive data. While we strive for 100% accuracy, enthusiasts should always conduct physical inspections and consult service records. View Full Disclaimer