Mercedes-Benz · Coupé · 2002–2010
Mercedes-Benz CLK C209 Coupé
Weaknesses, engine ratings and buying advice
★★★★★
1.4 / 5.0 · Based on 9 engine variants Most Fun Engine
457–525 PS
6.2L V8 AMG Benzin
CLK 63 AMG — V8 Coupé of the Old School
Legendary! Problem Engine
457–525 PS
6.2L V8 AMG Benzin
10 weaknesses
Stay Away!Engine Overview
The Mercedes-Benz CLK C209 Coupé is available with 13 engine variants — from 120 to 525 hp.
CLK 220 CDI
2005 2010
Stay Away! 6 weaknesses
CLK 270 CDI
2002 2005
Stay Away! 6 weaknesses
CLK 320 CDI
2005 2010
Stay Away! 7 weaknesses
CLK 200 CGI Engine Change
2003 2005
Stay Away! 6 weaknesses
2003 2005
Stay Away! 6 weaknesses
CLK 200 Kompressor Engine Change
2002 2006
Stay Away! 6 weaknesses
2002 2006
Stay Away! 6 weaknesses
2006 2010
Stay Away! 6 weaknesses
CLK 240
2002 2005
Be Careful 7 weaknesses
CLK 280
2005 2010
Stay Away! 6 weaknesses
CLK 320
2002 2005
Be Careful 7 weaknesses
CLK 350
2005 2010
Stay Away! 6 weaknesses
CLK 500 Engine Change
2002 2006
Be Careful 10 weaknesses
2006 2010
Stay Away! 9 weaknesses
CLK 55 AMG
2002 2006
Be Careful 10 weaknesses
CLK 63 AMG
2006 2010
Stay Away! 10 weaknesses
CLK 63 AMG Black Series
2007 2009
Stay Away! 10 weaknesses
Vehicle Weaknesses
| Weakness | Cost | |
|---|---|---|
| 5G-Tronic: Coolant Ingress via Valeo Cooler Valeo transmission oil heat exchanger on pre-facelift models up to 09/2003 develops leaks. Coolant enters the transmission and destroys the clutch packs. Symptom: humming and juddering at low revs. Symptoms: Humming and juddering under light acceleration at low rpm, cloudy transmission fluid from 70,000 km | High |
Frequently Asked Questions
What problems and weaknesses does the Mercedes-Benz CLK C209 Coupé have? +
The Mercedes-Benz CLK C209 as Coupé has 72 known weaknesses, 5 vehicle-related.
Which engine is recommended? +
Be Careful: M112 (3.2L V6), M113 (4.3-5.4L V8). No engine is rated 'Good Choice'.
Is the Mercedes-Benz CLK C209 Coupé worth buying used? +
Caution is advised with the Mercedes-Benz CLK C209 Coupé — 7 of 9 engine variants are rated 'Stay Away!'.
Last updated: February 2026 · All information without guarantee