Mercedes-Benz GLE 350
Four-cylinder turbo with 48V belt starter-generator. Modern, efficient engine with EQ Boost mild hybrid. Timing chain long-lived.
Adequately Powered
188 kW in an SUV is adequate for daily use. Not exciting, but not underpowered either.
Engine Weaknesses 12
Defective exhaust valves and soft valve guides lead to severe cylinder head damage. Often just after the warranty expires. Mercedes USA extended the warranty to 15 years/150,000 miles.
Symptoms: Sudden severe misfires, CEL flashing, power drop, dangerous stalling at motorway speed
The electric motor is integrated into the 9G-Tronic. With faults in the high-voltage cables the gearbox must be removed — extremely costly repair.
Symptoms: Fault message 'Hybrid drivetrain disturbed', no electric drive possible, vehicle runs as pure combustion engine only, sometimes emergency shutdown
The hydraulic chain tensioner on the M264 can lose oil pressure after extended standstill. On cold start the timing chain rattles briefly until oil pressure builds.
Symptoms: Brief rattling on cold start (2–5 seconds), disappears after warm-up
The integrated starter-generator (ISG) of the M264 EQ Boost system can fail. Start-stop function and boost support are lost. Expensive replacement.
Symptoms: Start-stop function deactivated, no EQ Boost on pull-away, 48V system fault message, rougher engine start
The M264 uses multiple electric coolant pumps. Internal motor defects trigger fault codes. Bleeding requires the Mercedes diagnostic tool.
Symptoms: Coolant temperature warning, fault codes P0A0500/P00B700/P0C7300, irregular engine temperature
The PHEV lithium-ion battery measurably loses capacity at high mileage. Faulty temperature sensors can trigger emergency shutdown of the hybrid drivetrain.
Symptoms: Electric range drops significantly, warning 'Stop immediately', unexpected shutdown of hybrid drivetrain
The 48V lithium-ion battery of the EQ Boost system loses capacity over time. With severe degradation the boost function is curtailed.
Symptoms: Reduced EQ Boost output, more frequent start-stop deactivation, 48V warning on display
The camshaft adjuster solenoid valves on the M264 can leak internally. Variable timing no longer functions correctly, engine runs rough.
Symptoms: Rough idle, camshaft position fault codes, slight power loss in the lower rev range
Direct injection without port injection leads to carbon deposits on intake valves, especially with short-trip use. Impairs intake flow and combustion.
Symptoms: Hesitation and rough idle from approx. 80,000 km, slight power drop, elevated fuel consumption, knock tendency under load
The OPF requires temperatures above 600°C for active regeneration. With frequent short trips under 10 km the filter cannot regenerate and becomes progressively blocked.
Symptoms: Check engine light, elevated fuel consumption, forced long-distance drive needed for regeneration, engine power reduced
Turbocharging and direct injection thermally stress spark plugs more heavily. Ignition coils can electrically fatigue at high mileage and cause misfires.
Symptoms: Misfires, rough engine running, hesitation on acceleration, check engine light, poor throttle response
Valve cover gasket and rear crankshaft seal tend to leak at higher mileage. Oil loss on the hot engine can cause smoke.
Symptoms: Oil smell when parked, visible oil puddles under the vehicle, dropping oil level, bluish smoke from engine bay
Vehicle Weaknesses 10
Incorrectly fitted A/C condensate drain hoses direct water into the interior. Short circuits and fire risk. KBA recall 012644 affects 11,601 vehicles.
On early V167 models, damper rod seals do not meet specification. Leaking hydraulic fluid leads to premature failure.
An incorrectly welded stud on the right-hand side of the vehicle allows water ingress. Electrical connections for the engine, lighting and wipers can fail. Approximately 3,576 vehicles affected.
Incorrectly routed condensate drain hoses direct water into the vehicle interior. Contact with electrics can cause short circuits and fire risk. Recall KBA 012644, 171,463 vehicles worldwide.
On early C167 examples, the damper rod seal cannot meet long-term sealing requirements. Risk of tipping at maximum load and cornering.
Incorrectly routed A/C condensate drain hoses can cause short circuits and fire risk. Approximately 171,463 vehicles worldwide affected.
Incorrectly secured window channel trim strips can detach while driving. Approximately 450,000 vehicles on the 167 platform worldwide affected.
The infotainment system freezes occasionally. Climate control and seat adjustments become non-functional. Software updates only partially improve the situation.
Decorative trim strips on rear doors detach. Around 450,000 vehicles affected. Mercedes covers costs under a goodwill action.
The MBUX system no longer responds to touch inputs or hangs on long journeys. Software updates alleviate the problem but rarely solve it permanently.
Reports & Tests
231 owner complaints filed with NHTSA (2019–2025). Most reported: Engine (61), Electrical (44), Other (36).