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Mercedes Benz Clk350 Problems

The Mercedes-Benz CLK350 was a mid-size luxury coupe and convertible produced from 2006 to 2009, powered by a refined 3.5L V6 producing 268 horsepower. With 272 complaints and no recorded deaths, the CLK350 offered elegant styling and comfortable grand touring capability. It represented the more accessible entry point to Mercedes coupe ownership compared to the V8-powered CLK550, balancing performance with better fuel economy.

272
Total Complaints
14
Total Recalls
5
Model Years
0
Reported Deaths
✓

Best Years

These years have the fewest reported problems.

2009 2010

Common Problem Categories

Fuel/propulsion System 60
Air Bags 34
Electrical System 26
Power Train 22
Engine 22

Complaints by Model Year

All Model Years

Year ↓ Complaints Recalls Crashes Fires Rating
2010 2 0 0 0 Good
2009 20 3 2 0 Good
2008 46 3 0 6 Average
2007 100 4 0 0 Below Average
2006 104 4 6 0 Below Average

Mercedes Benz Clk350 Years to Avoid

The 2006 first-year CLK350 accumulated the most complaints with transmission hesitation, electrical gremlins, and premature brake wear. The 2007 models continued some transmission programming issues and added concerns about failing window regulators and command system freezes.

Best Mercedes Benz Clk350 Years

The 2009 final year CLK350 represents the most refined version with software updates addressing earlier transmission concerns. The 2008 models also show improvement over the initial 2006 release. Note that the CLK was replaced by the E-Class Coupe for 2010.

Frequently Asked Questions

Is the CLK350 reliable?

The 3.5L V6 (M272) has proven generally reliable but requires attention to the balance shaft sprocket issue that affected some engines. Transmission and electrical concerns are more common than engine failures.

What is the M272 balance shaft issue?

Early M272 engines (2005-2008) had balance shaft sprockets prone to premature wear, causing timing problems and potentially engine damage. A telltale rattle on cold starts indicates trouble. Affected engines need inspection and possible repair costing $2,000-$4,000.

CLK350 versus CLK550?

The CLK350's V6 provides adequate power for most driving while returning better fuel economy. The CLK550's V8 offers more thrust but similar concerns. For relaxed cruising, the 350 makes sense; for performance priority, the 550 delivers.

How expensive is CLK maintenance?

As an older Mercedes, the CLK350 requires premium fuel, synthetic oil, and Mercedes-trained technicians for complex repairs. Budget $1,500-$2,500 annually for maintenance and set aside funds for eventual brake, suspension, and timing chain service.

Is the CLK350 convertible reliable?

The convertible adds hydraulic top mechanism complexity. Top malfunctions, hydraulic leaks, and drain tube clogs create additional expense. Coupe models are simpler and less problematic.