Mercedes-Benz CLK C208

CLK in brief

The CLK was produced in two generations: C208 (1997–2002) and C209 (2002–2010). Both were offered as coupés and convertibles (A208, A209). The technology was borrowed from the contemporary C class, while the styling with distinctive twin headlights was reminiscent of the E class. Later, the CLK was replaced by the E class coupé and convertible.

Today, the CLK is not bought as an affordable daily driver, but for its style, comfort, and powerful engines. Most of these cars are now over 15 years old, so the technical condition, rust, and service history are more important than the trim level. Well-maintained examples, especially convertibles and V8 versions, are increasingly sought after by enthusiasts.

C208 and C209 — what's the difference

The C208 generation (1997–2002) was based on the W202 C class. It was a simpler construction, but Mercedes-Benz cars of that era were notorious for poor corrosion protection, so rust is the most common issue with this generation. In 1999, refreshed models received an improved interior and newer engines.

C209 generation (2002–2010) based on the W203 C-Class: it's larger, safer, quieter, and more modern, with more electronics. Cars updated in 2005 received new V6 engines, a 7G-Tronic automatic transmission, and an improved interior, so it's usually recommended to go for the updated C209.

Convertibles feature an electrically operated soft top. They're pricier and heavier than coupés, and repairs to the roof mechanism can be costly.

Engines and transmissions

In the C208 generation, you'll only find petrol engines: 200 and 200 Kompressor, 230 Kompressor (four cylinders), 320 (3.2-litre) and 430 (V8), with the most powerful being the CLK 55 AMG.

In the C209 generation, petrol engines include: 200 Kompressor (1.8-litre, four cylinders), 240 and 320 (V6), and from 2005 onwards, 280 and 350 (new V6s), 500 (V8) and AMG versions (55 AMG, later 63 AMG). Diesels: 270 CDI (five cylinders), and from 2005, 220 CDI and 320 CDI (V6).

Transmissions are manual (more common with four-cylinder engines) or automatic: up to 2005, five-speed, and later in more powerful versions, seven-speed 7G-Tronic. In the used market, you'll mostly encounter cars with an automatic gearbox.

What to check when buying a used CLK

Rust is key, especially in the C208 generation: inspect the wheel arches, sills, door bottoms, boot lid, and tailgate supports. The C209 rusts less, but these cars are getting on a bit too. The convertible roof should open and close smoothly, and there shouldn't be any moisture or water marks inside the cabin.

Early M271 (200 Kompressor) and M272 (280, 350) engines have a weak spot in their timing mechanisms: the chain, variable valve timing regulators, and for the M272, the balance shaft sprocket. A cold engine shouldn't rattle after starting, and diagnostics shouldn't show any faults. On CDI diesels, check for leaks around the injectors, and on the 320 CDI, ensure the oil doesn't get sluggish near the oil cooler.

The automatic gearbox should shift smoothly, without any jolts. Test all the electronics: windows, seats, climate control, and the sunroof mechanism. Check the mileage and history via service records—older cars' mileage can be tampered with.

Trim levels

Names and equipment vary by market and year; we list the most commonly found trims in Europe.

C209 generation trim comparison

Many buyers' best choice is the refreshed C209 Avantgarde with a proven engine and clean history. AMG versions are worth buying only with a verified service history and checked at a specialist service.

Frequently asked questions