The 2024 GLE350 W167 with the M264 2.0L turbo four-cylinder is still very new, but early patterns mirror issues from 2020-2023 models: oil consumption from piston ring problems, transmission cooler leaks, and mount failures. These engines can be fragile under stress.
Excessive Oil Consumption / Piston Ring Failure (M264 Engine)
Occasional · high severity
Typical onset: 40,000-80,000 mi
Symptoms: Blue smoke on startup or acceleration, Low oil warning light between changes (consuming 1+ quart per 1,000 mi), Carbon buildup on intake valves causing rough idle, Loss of power under load
Fix: Piston ring replacement requires engine disassembly (18-24 labor hours). Some cases need full short block if cylinder scoring present. Often combined with carbon cleaning service. This is a known M264 weak point across Mercedes lineup.
Estimated cost: $6,500-12,000
Transmission Oil Cooler Line Leaks (9G-Tronic)
Common · medium severity
Typical onset: 30,000-70,000 mi
Symptoms: Transmission fluid spots under vehicle (red or brown fluid), Transmission temperature warning on dash, Harsh shifting when cold, Fluid level drops requiring frequent top-ups
Fix: Cooler lines corrode at crimped fittings or cooler itself develops pinhole leaks. Replacement of cooler assembly and lines takes 4-6 hours including fluid flush. Often caught early during service inspections.
Estimated cost: $1,200-2,200
Transmission Mount Failure
Occasional · medium severity
Typical onset: 50,000-90,000 mi
Symptoms: Clunk or thud when shifting from Park to Drive/Reverse, Excessive vibration at idle in gear, Visible engine/trans movement when accelerating hard, Rubbing noises from underneath on rough roads
Fix: Front transmission mount (dogbone style) tears at rubber isolator. Requires subframe access, 3-4 hours labor. Often replaced alongside engine mounts as preventive measure since access overlaps.
Estimated cost: $800-1,400
Fuel Filter / Fuel System Contamination
Occasional · medium severity
Symptoms: Rough running or misfires under acceleration, Check engine light with fuel pressure codes (P0087, P228D), Extended cranking before start, Limp mode activation
Fix: Integrated fuel filter in tank clogs prematurely from poor fuel quality or tank debris. Filter replacement requires dropping fuel tank (5-7 hours). Some cases need injector cleaning or replacement if contamination severe. Not routine maintenance—driven by fuel quality issues.
Estimated cost: $1,500-3,000
Turbocharger Wastegate Rattle / Failure
Occasional · high severity
Typical onset: 60,000-100,000 mi
Symptoms: Rattling noise on cold start (first 30 seconds), Reduced boost pressure / sluggish acceleration, Check engine light with underboost codes (P0299), Turbo whistle or whine changes pitch
Fix: Wastegate actuator arm wears or sticks; sometimes full turbo replacement needed if wastegate flapper damaged. Turbo R&R is 8-10 hours on this platform due to tight engine bay. Catch early to avoid catastrophic turbo failure.
Fix: Air struts develop leaks at bellows or seals; compressor wears from overwork. Individual strut replacement is 2-3 hours each; compressor is 4-5 hours. Many owners convert to coil springs ($2,500-3,500) to avoid repeat failures, but loses adaptive damping.
Estimated cost: $1,800-3,200 per strut; $2,000-2,800 compressor
Owner tips
Check oil level every 500 miles religiously—M264 oil consumption can escalate quickly and starve the engine
Use Top Tier fuel exclusively; this direct-injection engine is sensitive to fuel quality and carbon buildup
Service transmission fluid every 40,000 mi (not 'lifetime' as claimed)—prevents cooler and valve body issues
Inspect transmission cooler lines at every oil change for seepage; early catch saves major mess
Budget $1,500/year for surprises after warranty—these are complex, tightly-packaged vehicles with expensive failure modes
Wait for CPO warranty or budget $3k-5k/year in post-warranty repairs—the M264 four-cylinder is a weak point in an otherwise solid luxury platform, and early oil consumption issues can cascade into five-figure engine work.
AI-assisted summary drawn from NHTSA recall data, our labor-times database, and platform knowledge. Not a substitute for a pre-purchase inspection on a specific vehicle.
Fitment notes: OEM size: 12V 12Ah AGM (Mercedes backup/auxiliary battery, e.g. A000982xxxx type) · Location: engine bay — under the cowl/plenum area near the firewall (passenger side on LHD cars); on some builds packaged near the main battery tray · Purpose: voltage support during start-stop restarts and backup power for critical control units
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Every control module on the 2024-2026 Mercedes-Benz GLE350 W167 — where it lives, replacement time, and what it takes to program a replacement. Modules marked dealer / factory tool won't work after a part swap alone — budget for programming.
Augmented Reality Head-Up Display Control Unit (AR-HUD)2.5 hr R&Rdealer / factory tool +1.0 hr▸ programming details
📍 Dashboard, above instrument cluster
🔧 Xentry Diagnostics + calibration
⚠️ Optional AR head-up display. Requires precise calibration after replacement. Available 2024+.
Transmission Control Unit (TCU)2.5 hr R&Rsecurity gateway +1.0 hr▸ programming details
⚠️ Factory trailer hitch option. Requires activation coding if retrofitted.
Fuel Pump Control Module (FPCM)0.5 hr R&Rrelearn only +0.2 hr▸ programming details
📍 Left rear cargo area, near SAM-R
🔧 Xentry or scan tool
⚠️ Self-adapts after installation. Fault code clearing required.
Aftermarket tool coverage varies by software version and vehicle build — treat "aftermarket tool" rows as "usually possible" and verify against your tool maker's coverage list before promising a customer. Spot a wrong location or hour? Tell us — corrections ship fast here.
Size-standard part numbers — verify your connector type before buying. Rear blades are model-specific; check the package's vehicle list.
Fuel economy figures are EPA data via fueleconomy.gov (median across matching trims). Performance figures are compiled estimates for the 2024 Mercedes-Benz GLE350 W167 2.0L I4 Turbo M264 and can vary by trim.
🔧 Database maintained under the daily editorial review of Chris Hackleman · Master Technician · 20+ years.