2011 Mercedes-Benz E350 Repair and Maintenance

A guide to problems, costs, maintenance and repair for your 2011 Mercedes-Benz E350

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2011 Mercedes-Benz E350 Problems

Check Engine Light Due to Faulty Camshaft Adjuster Solenoid

The camshaft adjuster solenoid (which is related to the variable valve timing system) may fail or timing chain/balance shaft components may wear, resulting in illumination of the Check Engine Light and various drivability issues. Mercedes-Benz has released a service bulletin outlining specific repair instructions depending on fault codes stored.

Oil Seepage on Back of the Cylinder Heads

The Mercedes Benz E350 may have engine oil seeping or leaking from the back of the cylinder heads. This is commonly misdiagnosed as leaking valve covers.

On the back of the cylinder heads there are three, in total, plastic expansion plugs that plug access ports to the camshafts. These plugs are well known for seeping oil, and leaking if left unattended. The oil will run down the back of the engine and eventually make it to the ground. 

Replacement of these three plastic plugs is extremely simple, and should be done as regular maintenance. The recommended interval for replacement is every 60,000 miles.

The Power Steering Fluid Reservoir Leaks

The power steering reservoir designed for the Mercedes Benz E350 commonly leaks power steering fluid causing a screeching sound when turning the steering wheel, especially when the vehicle is stopped. The power steering light may illuminate on the dash for more severe leaks.

This is caused by cracking in the plastic reservoir, or a hardened, brittle seal between the power steering reservoir and power steering pump.

Remediation involves replacing the power steering fluid reservoir, power steering fluid, bleeding the system of air, and replacement of the seal between the reservoir and power steering pump.

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2011 Mercedes-Benz E350 Recalls

Passenger Frontal Air Bag Inflator Ruptures On Deployment

The passenger frontal air bag inflator may rupture on deployment, causing metal fragments to come through the air bag and injure occupants. Dealers will replace the passenger frontal air bag module free of charge to resolve the concern.

Driver's Frontal Air Bag Inflator Ruptures And Sprays Metal Fragments

The driver's frontal air bag inflator may deploy the air bag with excessive pressure, resulting in the inflator rupturing and causing metal debris to be sprayed onto vehicle occupants. Dealers will replace the driver's frontal air bag module free of charge to resolve the concern.

Potential Fuel Leak

Due to a manufacturing defect, a crack can develop on the fuel filter when the vehicle is operated in high temperatures. This crack can result in a fuel leak, increasing the risk of a fire. Dealers will replace the fuel filter to correct this concern.

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2011 Mercedes-Benz E350 Reviews

Rated
based on 5 customer reviews
Bought this 2011 E350 last month. 42k miles. She's a beaut. I have owned Merc diesels in the past and was looking for a Bluetec, but settled on the V6 4Matic. I love this car's looks, everything about it. I've missed having a Mercedes for a number of years. I owned an 'E' class in the early 80's that was a 4Matic and almost bankrupted me for that very reason. This go round, I purchased a...
So far I am very pleased with my 2011E350. When I step on the gas hard my neck snaps back and every car in my rear view mirror disappears. The sound system rocks. I wish it would have come with leather interior though. It's in the shop now for what I suspect is a failed gateway module. To be contd....
I have been experiencing four dead batteries within the first thousand miles (dealer replaced battery). Key recognition issues, which also had to be replaced. Obviously, there are issues draining the batteries overnight, and I driving the car every day doesn't make a difference. Massage chair started malfunctioning, and continued running after shutting the car off. On a few occasions, we wou...

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