These five used Mercedes-Benz models have reported issues that could turn an attractive bargain into an expensive ownership headache.
Mercedes-Benz has been associated with luxury and comfort for decades. But even the German automaker has produced models that can cost used-car buyers far more in repairs than they deliver in driving enjoyment.
When shopping for a used Mercedes-Benz, it's important to look beyond mileage, body condition and maintenance records. Experts at SlashGear identified five used models that deserve extra scrutiny before you sign the paperwork.
2015 Mercedes-Benz C300
The C300 attracted plenty of attention when it debuted for the 2015 model year, thanks to its elegant styling, comfortable interior and upscale equipment. Over time, however, owners began reporting a range of technical problems.
One of the more common complaints involved its four-cylinder engine. The National Highway Traffic Safety Administration (NHTSA) received dozens of complaints, including reports involving the P052E trouble code associated with the crankcase ventilation valve.
The car also experienced electrical issues. Mercedes-Benz conducted a recall related to a malfunction involving the power steering control unit. The panoramic roof also drew attention after reports that it could shift out of position and, in some cases, that individual components could potentially detach.
As a result, anyone considering a 2015 C300 should pay close attention to the vehicle's maintenance and recall history before buying.
2006 Mercedes-Benz E350
The E350 eventually became a popular Mercedes-Benz model, but the first model year has a less favorable reputation among used-car shoppers.
One of the most serious issues involves the engine's balance shaft. A failure could cause severe vibration, engine misfires and, in some cases, a loss of power.
The fuel system is another area worth checking on a 2006 E350. Owners reported fuel leaks and strong gasoline odors inside or around the vehicle. Mercedes-Benz eventually extended the warranty on the affected components to 15 years because of the issue.
For a vehicle that is now roughly 20 years old, a major engine or fuel-system repair can be particularly expensive.
2012 Mercedes-Benz C250
The C250 was one of the more affordable members of the C-Class lineup before production ended in 2015. However, 2012 models generated a significant number of complaints from owners.
Reported problems included issues with the engine, electronics and safety systems. Some recall campaigns involved airbags that could fail to operate properly.
The engine deserves particular attention. Owners have reported a distinctive metallic or "tractor-like" noise during startup. Possible causes include problems with the variable valve timing system, timing chain or chain tensioner. In severe cases, repairs could require expensive components or even engine replacement.
There have also been reports of severe corrosion affecting the rear subframe, potentially leading to cracks.
2019 Mercedes-Benz GLC
Owners of the 2019 GLC reported problems involving the electrical system, steering, seat belts and certain body components. One known issue involved the possibility of the front decorative trim panel becoming detached while the vehicle was being driven.
Several recall campaigns affected the GLC for the 2019 model year. Some drivers also criticized the standard equipment, noting that certain driver-assistance features offered as standard by competitors were available on the Mercedes-Benz only as part of more expensive packages.
Anyone considering a 2019 GLC should carefully check the specific vehicle's recall and service history.
2020 Mercedes-Benz GLE
A number of complaints involving the 2020 GLE concerned its electronics and 48-volt electrical system. Owners also reported air-conditioning problems in which improperly installed components could allow water to enter the driver's or passenger's footwell.
Persistent moisture can lead to corrosion and damage electrical components. Some recall campaigns also involved the ground connection for the 48-volt system.
There were additional reports of problems involving the cruise-control system and other electronic functions. Buyers considering a 2020 GLE should therefore verify that the vehicle has received all applicable recall repairs.
What to Check Before Buying a Used Mercedes-Benz
Even a model with a questionable reputation isn't necessarily a bad purchase. The condition of an individual vehicle, its mileage and how well it was maintained can make a significant difference.
Before buying, check:
A comprehensive pre-purchase inspection at a qualified Mercedes-Benz specialist is also recommended. It can uncover potentially expensive problems before the vehicle becomes your responsibility.