2005 — 2008
3.5L M272 E35 V6 - E350
Petrol
Test drive task: Perform a cold start and listen for a rattling sound from the front of the engine for the first 3-5 seconds. | Detail: This can sometimes be an indicator of the balance shaft sprocket wear, which is a known characteristic of early M272 engines.
Check this by: Cycling through the transmission gears while stationary and then on a flat road. | Detail: Keep an eye out for hesitant gear changes; the 7G-Tronic transmission performs best when the fluid has been changed regularly, so check for maintenance records.
While inspecting: Open the bonnet and check the valley of the engine for signs of oil pooling or coolant leaks. | Detail: The intake manifold linkage can become brittle with age, and it's worth noting the condition of the thermostat housing.
Check this by: Activating the air conditioning and heater while stationary. | Detail: In cars of this age, the climate control blend door motors can occasionally become sluggish or fail to switch zones effectively.
Usually the time for a major transmission fluid flush and filter change to keep the 7G-Tronic shifting smoothly.
Often the period where the secondary air injection system and associated vacuum lines may require a thorough inspection.
A common point to review the condition of the engine and transmission mounts, which can impact cabin vibration levels.
Confirm the logbook shows regular oil changes using high-quality synthetic oil.
Verify the coolant has been flushed, as this helps protect the radiator and engine seals.
Inspect the condition of the brake discs and pads, as these are heavy vehicles that use their brakes effectively.
Check for any stored fault codes using an OBDII scanner, even if the dash lights are clear.
Ensure all electrical features like seat adjustments and interior lighting are operational.
Estimated repair costs if issues arise
If the engine serial number falls within the affected range and symptoms appear, this is a significant job requiring engine removal. It's wise to verify if this has been addressed by a previous owner.
If your E350 is equipped with Airmatic, the air struts and compressor are items to keep an eye on as the vehicle ages. You might eventually need to budget for a strut refresh if the car sags after sitting.
The plastic linkage for the intake manifold can eventually wear out, which may trigger a check engine light. It is common to replace the entire manifold assembly when this occurs.
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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