Faults:

Heated Seat was warming up too much, had to be replaced twice.

Driver's window wouldn't roll up, new motor.

Fuel Pump failed, was replaced.

Sunroof insulation got loose and sunroof wouldn't work right.

Power Steering hose fell off so there was no power steering.

Engine Coolant hose fell off.

CD Changer stopped working, new CD Changer.

Catalytic Converter had a hole in it, needed to be replaced.

Front Brakes already needed to be replaced after 30K, and Rear Brakes need replacing soon.

Tires are very worn, need replacing.

Fluid leaking during cold weather, dealer can't figure out what's leaking.

Can't think of any others, but I think there were some more.

General Comments:

The vehicle has a very nice ride and is very comfortable, but definitely not worth the money that was paid for it.

My last vehicle had no problems for the 5 years that I owned it for.

I will never consider to buy another Mercedes in my life. I always thought that a Mercedes would be reliable and last me a very long time, but after almost 3 years I want to get rid of it very bad.

Faults:

The brakes required replacement at 22k. Still continues to have a squeaking noise. More evident with brake dust buildup.

The power steering malfunctioned due to a defective hose clamp. Required replacement. Dealership reports this is a common manufacturing defect and may be replaced again.

Power window motor required replacement on the driver's side.

Engine light on: Transmission module control malfunctioned. Replaced and covered under warranty twice.

SRS (airbag deployment system) malfunctioning. In the process of making an appointment.

General Comments:

The comfort and drive (when there are no intermittent problems) is impeccable. You must purchase an extended warranty in order to prevent trading in your Mercedes when problems occur. Don't be surprised if you are on a first name basis with the rental/loaner company when visiting the Mercedes Service Department.

Faults:

We had problems with the security system right from the start. It would lock, we'd come back to the car and the remote would no longer work. This resulted in replacing the keys themselves several times and ultimately the whole system.

The car went in for noise in the sunroof when opening and closing it. It took us several weeks to get that resolved and ended up with a new sun-roof.

Replaced the brakes at 20,000 miles.

Early on the braking system warning light kept coming on. This was a bad switch and was replaced.

The airbag and restraint system light came on due to a bad seat belt. The seat belt was replaced at least twice before the light stopped coming on.

Replaced two window motors at 32,000 miles.

Constant problems with the oil. The light would always go on. The oil would be low, but no leaks could be found. They tried switching to synthetic, but ended up replacing the entire engine.

Once the engine was replaced, we had it in the shop for three weeks straight because of rattling. When it came back, it leaked oil all over the driveway. It went back to the dealer today for that problem.

There have been so many problems, I am probably forgetting some.

I expected to see more people with problems with the ML320. Maybe we just got the lemon.

General Comments:

We bought the car because of its safety features.

Despite all of its mechanical problems, I like the car itself. It is comfortable and handles really well.

For the price, it would be nice if they added a few amenities like a compass and dual climate control.

Faults:

Driver's door seal came off. The dealer replaced it; however, it is coming off again. I am not very happy with the quality of the USA built Merc. I owned a 400E before and its quality was much better.

Noise in the A pillar of the passenger side. The A pillar was taken apart and a bracket was replaced.

The sun-roof has inordinate amount of noise when on the highway.

The left rear brake light assembly is of poor quality. It needs replacing. The alignment is off and the bare light bulb is showing through.

The brakes squeal a lot. It was replaced at 12000 KM and now the noise has returned. The dealer says this is normal for a Mercedes. I don't buy that.

General Comments:

Generally I am happy with the power of the V8 engine.

The interior is bare for a vehicle costing this much. It needs an automatic climate control for one.