The 2024 W213 E350 with the M264 2.0L turbo four is too new for widespread pattern failures, but early adopters and prior model years reveal oil dilution issues, transmission cooler leaks, and concerning bottom-end wear that can grenade the engine if ignored.
M264 Oil Dilution and Piston Ring Wear
Occasional · high severity
Typical onset: 40,000-80,000 mi
Symptoms: Oil level rising between changes, smells like fuel, Rough cold starts, misfires, low compression on one or more cylinders, Metal shavings in oil, knocking noises from bottom end
Fix: Mercedes issued TSBs for piston ring updates, but severe cases need short block replacement or full engine rebuild. Expect 18-25 hours labor for short block swap, 30+ for full teardown. Some warranty extensions exist through 80k mi, check eligibility first.
Estimated cost: $8,000-15,000
9G-Tronic Transmission Oil Cooler Leaks
Common · medium severity
Typical onset: 50,000-90,000 mi
Symptoms: Red fluid pooling under engine bay, near front of transmission, Low transmission fluid warning on dash, Harsh shifts or delayed engagement if fluid level drops significantly
Fix: External cooler lines corrode or cooler itself cracks at welds. Replace cooler and lines, flush system, refill with MB 236.17 fluid. 3-4 hours labor, straightforward job but parts aren't cheap from dealer.
Estimated cost: $800-1,400
Transmission Mount Failure
Occasional · low severity
Typical onset: 60,000-100,000 mi
Symptoms: Clunk or thud when shifting from Park to Drive or Reverse, Vibration at idle that disappears under load, Visible sag or cracking in rubber mount when inspected from below
Fix: Hydraulic transmission mount fatigues, loses damping. Replacement requires supporting trans, usually 2-3 hours labor. Use OEM or Lemforder; cheap aftermarket mounts fail quickly.
Estimated cost: $400-700
Connecting Rod and Main Bearing Wear (Severe Cases)
Rare · high severity
Typical onset: 60,000-100,000 mi
Symptoms: Deep knocking from lower engine, louder when cold or under load, Low oil pressure warnings, fluctuating gauge readings, Metal fragments on oil filter media or drain plug magnet
Fix: Result of oil dilution or extended oil change intervals. Requires full bottom-end rebuild: crank polishing or replacement, new bearings, pistons, rings. 25-35 hours labor. Often totals the car if out of warranty.
Estimated cost: $10,000-18,000
High-Pressure Fuel Pump Failure
Occasional · medium severity
Typical onset: 70,000-120,000 mi
Symptoms: Long crank times, especially when hot, Intermittent stumbling or power loss under hard acceleration, Fuel pressure fault codes (P0087, low rail pressure)
Fix: M264 uses cam-driven HPFP; internal seals or plunger wear out. Replace pump and fuel filter together. 2.5-3.5 hours labor. Genuine MB part required, aftermarket pumps cause comebacks.
Estimated cost: $1,200-1,800
Turbocharger Wastegate Rattle and Boost Control Issues
Occasional · medium severity
Typical onset: 80,000-130,000 mi
Symptoms: Rattling noise from engine bay on cold start that fades in 30-60 seconds, Reduced power, limp mode, turbo underboost or overboost codes, Turbo lag or surging during acceleration
Fix: Wastegate actuator rod wears, electronic actuator fails, or exhaust side carbon buildup causes sticking. Often needs turbo R&R for actuator replacement or turbo rebuild. 6-8 hours labor, more if coolant lines corroded.
Estimated cost: $2,000-3,500
Owner tips
Change oil every 5,000 miles with MB 229.52 spec oil to minimize dilution and bearing wear—ignore the 10k interval
Check oil level monthly; rising level between changes is your first clue to ring trouble, catch it early
Inspect transmission cooler lines and pan seals annually, replace fluid every 40k miles regardless of 'lifetime fill' marketing
Keep battery and alternator healthy; weak electrical system causes phantom trans faults and limp modes on 9G-Tronic
Use Top Tier fuel religiously; HPFP and injectors are sensitive to poor-quality gas, especially E85 blends
Skip the 2024 unless CPO with extended warranty; wait for 2025+ with updated pistons and rings, or buy a six-cylinder—M264 is a ticking time bomb without religious maintenance.
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: AGM battery required; located in trunk; auxiliary battery located in engine bay
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Every control module on the 2021-2024 Mercedes-Benz E350 W213 — 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.
Electric Power Steering Control Unit (EPS)2.8 hr R&Rsecurity gateway +1.0 hr▸ programming details
📍 Steering column, integrated with steering rack
🔧 Xentry Diagnostics + SCN online
⚠️ Requires steering angle sensor calibration and wheel alignment after replacement.
Transmission Control Unit (TCU)2.5 hr R&Rsecurity gateway +1.0 hr▸ programming details
⚠️ Memory seat settings lost. Relearn procedure available with most scan tools.
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 E350 W213 2.0L I4 Turbo M264 and can vary by trim.
🔧 Database maintained under the daily editorial review of Chris Hackleman · Master Technician · 20+ years and Jeff Moore · Master Lexus & Toyota Mechanic · 20+ years.