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Year Make/Model Repair Frequencysuccessful repair trips per 100 cars per year Compared to all models for the same year  
2014 Mercedes-Benz E-Class 39 E-Classes, 9.6 months of data per E-Class, average 11600 miles

Refreshed for this model year. Reliable so far.
26
30% 30% Fewest Trips Most Trips
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2012 Mercedes-Benz E-Class 25 E-Classes, 7.5 months of data per E-Class, average 26900 miles45
50% 50% Fewest Trips Most Trips
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2011 Mercedes-Benz E-Class 30 E-Classes, 7.7 months of data per E-Class, average 37300 miles52
50% 50% Fewest Trips Most Trips
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2010 Mercedes-Benz E-Class 29 E-Classes, 8.5 months of data per E-Class, average 48100 miles

Redesigned for this model year.
19
0% 0% Fewest Trips Most Trips
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2009 Mercedes-Benz E-Class   17 E-Classes, 9.1 months of data per E-Class, average 61300 miles

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2008 Ford Explorer Sport Trac   21 Explorer Sport Tracs, 9.4 months of data per Explorer Sport Trac, average 79100 miles

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2008 Mercedes-Benz E-Class 25 E-Classes, 9.4 months of data per E-Class, average 64400 miles46
30% 30% Fewest Trips Most Trips
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2007 Ford Explorer Sport Trac   10 Explorer Sport Tracs, 10.1 months of data per Explorer Sport Trac, average 123400 miles

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2007 Mercedes-Benz E-Class 28 E-Classes, 9.8 months of data per E-Class, average 80100 miles

Refreshed for this model year.
44
20% 20% Fewest Trips Most Trips
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2006 Mercedes-Benz E-Class 25 E-Classes, 10.0 months of data per E-Class, average 100200 miles100
80% 80% Fewest Trips Most Trips
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2005 Mercedes-Benz E-Class   20 E-Classes, 7.2 months of data per E-Class, average 117300 miles

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2004 Mercedes-Benz E-Class   13 E-Classes, 7.7 months of data per E-Class, average 132400 miles

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2003 Mercedes-Benz E-Class   11 E-Classes, 8.9 months of data per E-Class, average 105800 miles

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2002 Mercedes-Benz E-Class   10 E-Classes, 8.5 months of data per E-Class, average 136200 miles

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2001 Ford Explorer Sport Trac   11 Explorer Sport Tracs, 7.1 months of data per Explorer Sport Trac, average 144100 miles

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2001 Mercedes-Benz E-Class   12 E-Classes, 9.0 months of data per E-Class, average 130700 miles

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2000 Mercedes-Benz E-Class   12 E-Classes, 7.8 months of data per E-Class, average 122500 miles

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See reliability results for all Sedans, Wagons, and SUTs.
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Mercedes-Benz E-Class vs. Ford Explorer Sport Trac Reliability Comparisons

You won't find Mercedes-Benz E-Class or Ford Explorer Sport Trac reliability information like this anywhere else. Actual repair frequencies, not just vague dots, to make it clear how much the Mercedes-Benz E-Class and the Ford Explorer Sport Trac truly differ in reliability.

These stats are promptly updated four times a year, to much more closely track Mercedes-Benz E-Class and Ford Explorer Sport Trac reliability as the cars age. Others tell you how reliable the Mercedes-Benz E-Class and the Ford Explorer Sport Trac were a year ago, when the cars were a year younger and had 12,000 fewer miles on them. Only TrueDelta tells you how reliable the Mercedes-Benz E-Class and the Ford Explorer Sport Trac have been recently.

What People Are Saying about Reliability and the Mercedes-Benz E-Class

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What Our Members Are Saying about the Reliability and Durability of the Mercedes-Benz E-Class

Mercedes-Benz E-Class Reliability and Durability: Pros
YearBody/PowertrainComment
2008 4dr Sedan 302-horsepower 3.5L V6
7-speed shiftable automatic RWD
The 2008 E-Class is far more reliable than previous E-Class models, many of which are plagued by quirky electronic issues. No such issues with this model. Perhaps the most reliable model thus far.
2007 4dr Sedan 302-horsepower 3.5L V6
7-speed shiftable automatic RWD
They are not known for being inexpensive to maintain. While the scheduled maintenance trips are not cheap, so far I have had virtually no problems with the car. trips that are not but they are known for having
2005 4dr Sedan turbocharged 208hp 3.0L V6 Diesel
7-speed shiftable automatic RWD
Mercedes has long been known for reliability
2003 4dr Sedan turbocharged 402hp 4.7L V8
7-speed shiftable automatic RWD
The car still drives like a solid new car at 94000 miles
Mercedes-Benz E-Class Reliability and Durability: Cons
YearBody/PowertrainComment
2008 4dr Sedan 302-horsepower 3.5L V6
7-speed shiftable automatic AWD
Poor reliability in the past 5-10 years
2008 4dr Sedan 302-horsepower 3.5L V6
7-speed shiftable automatic AWD
Driver side mirror cracked in the cold in the first 2 months. Piece of driver door trim came loose after a couple of months.
2007 4dr Sedan It never works right. There is always some sort of other problem. Problem after problem after problem, it never ends.
2005 4dr Sedan Materials look & feel great, and seem well put together, but durability is questionable. E.g., glovebox door soft close craps out, as do the tweeter "triangle" housings in the forward door corners). Airmatic suspension is known problem area.
2004 4dr Sedan 302-horsepower 3.5L V6
7-speed shiftable automatic RWD
My repairs are mostly for simple things that should last longer. Engine and Trans are stellar.
2003 4dr Sedan The W211 E class is just a mess of problems waiting to happen. Probably the biggest is the tendency of the fuel tank and two fuel senders (underneath the back seat, by the way) to leak with no fix other than to replace them at a high cost (over $3,500). The fuel sender leak happens to be right around some electrical connections as well, so it is a wonder there haven't been any notable fire incidents. This is a known issue and there is an NTSB ongoing investigation (PE12001, which has been upgraded to the next level of action) because of the high number of vehicles affected. The fact that Mercedes doesn't own up to this issue after several iterations of re-engineered parts and continued failures is the main reason I will never buy another Mercedes. I have had to have this repair done, so I speak from experience.
2003 4dr Sedan The second major issue that owners of the W211 can expect to have is the SBC brake system. This was implemented on the '03 - '06 W211 and it was changed on subsequent years in 2007. The SBC unit, pressure reservoir, and the other parts of the brake system can alert you to a fault and minutes later leave you without brakes. This is unacceptable. Mercedes did put out a 10 year unlimited mileage warranty on the SBC unit itself, but I'll give you one guess as to when the fault will happen! If the pressure reservoir goes out, you won't even be able to get the car out of park, even just to get it in to neutral to get a tow. The brake sensors seem to be finicky and the brake switch as well. Knowing what I know now about the failed application of SBC, I'd never purchase an E class Mercedes between the years of 2003-2006. If I were to ever look in to purchasing a Mercedes again, I would do my homework on the types of systems in place. I have had to do this repair and others on the brakes, so I speak from experience.
2003 4dr Sedan The third major issue the W211's have is the airmatic system. A common fault is for the airmatic struts to leak, which requires replacement. One replacement cost is $1600. If you aren't under warranty, the bill could add up quickly if more than one goes out. The airmatic system is nice in principle, but in practice this is a common ailment. I had my left front go bad, so I speak from experience.
2003 4dr Sedan The W211's, and many other models of Mercedes, have two batteries. One main batter for starting, and an accessory battery for running convenience features, your brakes, etc. This is a definite source of trouble. When you have certain functions fail, the obvious place to look at a secondary battery isn't the first thing that comes to mind. A secondary battery that is slightly low on voltage can start to create havoc in your electronics. I have faced this a number of times, and actually, it is now one of the first things I check when something odd is occurring.
2003 4dr Sedan turbocharged 402hp 4.7L V8
7-speed shiftable automatic RWD
TOO many !@#$# trips to the dealer for ball joints, ignition key failure, Total brake failure of EBS, and $1000/visit oil change
 

What Our Members Are Saying about the Reliability and Durability of the Ford Explorer Sport Trac

Ford Explorer Sport Trac Reliability and Durability: Pros
YearBody/PowertrainComment
2002 4dr SUT 260-horsepower 4.0L V6
5-speed shiftable automatic 4WD, part-time
In 7 yrs of ownership-it has had to have a side viw mirror motor replaced under warranty-and besides oil changes and tire changes-thats it.