2022 MERCEDES-BENZ GLE350 W167

Typical onset: 30,000-80,000 mi

Symptoms: Metallic knocking or rattling from engine bay, especially on cold start, Sudden oil pressure warning light, Fuel smell in oil during dipstick check, Check engine light with misfire codes or cam/crank correlation faults, Complete engine seizure in worst cases

Fix: M264 suffers from fuel dilution into crankcase due to direct-injection issues and insufficient piston ring sealing. Fuel washes oil film off bearings, leading to spun rod or main bearings. Repair requires complete engine rebuild or short-block replacement. 18-24 labor hours for short block swap, plus teardown diagnosis time. Mercedes has issued technical service bulletins but no official recall as of early 2024.

Estimated cost: $12,000-18,000

Typical onset: 50,000-90,000 mi

Symptoms: Transmission fluid spots under vehicle, often pink/red, Transmission running hotter than normal on highway drives, Burnt transmission fluid smell, Harsh or delayed shifts when fluid level drops

Fix: External oil cooler lines and cooler itself develop seepage at crimped connections and internal cracks. Requires trans cooler assembly replacement and line set. 3-4 hours labor, accessible from underneath but requires dropping crossmember on some configurations.

Estimated cost: $800-1,400

Typical onset: 40,000-70,000 mi

Symptoms: Clunk or thud when shifting from Park to Drive or Reverse, Vibration felt through floorboard at idle, Excessive engine movement visible when revving in Park, Rattling over bumps from engine bay

Fix: Hydraulic transmission mount on these turbo 4-cylinders wear prematurely due to increased vibration from the smaller engine. Mount is a combined engine/trans unit requiring support of drivetrain. 2.5-3.5 hours labor.

Estimated cost: $600-1,100

Typical onset: 60,000-100,000 mi

Symptoms: Extended cranking before engine starts, Rough idle and hesitation under acceleration, Check engine light with fuel pressure/trim codes (P0087, P0191), Engine stalling at stop lights or when decelerating, Metallic ticking from fuel pump area on passenger side of engine

Fix: Direct injection system runs very high pressure. HPFP or injectors fail, often contaminating entire fuel system with metal shavings. Proper repair requires HPFP, all four injectors, fuel rail flush, and sometimes fuel filter housing. 6-8 hours labor if doing complete job correctly.

Estimated cost: $3,500-5,500

Typical onset: 60,000-100,000 mi

Symptoms: Vehicle sits lower than normal after sitting overnight, Compressor runs excessively (hear it cycling frequently), "Airmatic Visit Workshop" warning on dash, Uneven ride height side-to-side, Hissing sound from wheel wells

Fix: Airmatic struts develop leaks at bladder seals, compressor valve blocks crack. Front struts are 2-2.5 hours each, rears 1.5-2 hours. Compressor is 2.5 hours. Often you're replacing multiple components as system ages. OEM parts required for proper operation.

Estimated cost: $1,800-3,200 per strut; $2,500-3,500 for compressor

Symptoms: Visible moisture inside headlight lens, "Left/Right Headlamp Malfunction" warning, Individual LED segments not illuminating, Foggy appearance inside headlight housing

Fix: Multibeam LED headlights have sealing issues allowing moisture intrusion, which then corrodes LED driver modules. MB now covers some under extended warranty, but out-of-pocket requires complete headlight assembly replacement. 1.5 hours labor per side, but parts cost is brutal.

Estimated cost: $2,800-4,200 per headlight assembly