1. Mercedes-Benz C-Class (W204) (2007-2014): This generation of the C-Class was plagued by numerous issues, including engine problems, transmission failures, electrical malfunctions, and suspension problems.
2. Mercedes-Benz E-Class (W211) (2002-2009): The W211 E-Class is known for its rust issues, especially around the fenders, doors, and trunk lid. It also had problems with the air suspension, electronics, and engine oil leaks.
3. Mercedes-Benz ML-Class (W164) (2005-2011): The W164 ML-Class is known for its problems with the air suspension, steering components, and electrical issues. It also had a high incidence of engine oil leaks and transmission failures.
4. Mercedes-Benz R-Class (W251) (2005-2013): The R-Class minivan was not well-received by consumers due to its poor fuel economy, lack of cargo space, and uncomfortable ride. It also had problems with the air suspension, transmission, and electrical systems.
5. Mercedes-Benz GL-Class (X164) (2006-2012): The X164 GL-Class SUV is known for its problems with the air suspension, steering components, and electrical issues. It also had a high incidence of engine oil leaks and transmission failures.
It's important to note that these models are generally considered to be the worst based on consumer reports and reliability data. However, individual experiences may vary, and some owners may have had positive experiences with these models. It's always advisable to do thorough research and consider multiple sources of information before making a decision about purchasing a used Mercedes-Benz vehicle.
