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Mercedes-Benz CLS-Class CLS 63 AMG common faults.

2004–2008, saloon, petrol, 514 HP.

The fault list covers: M156E63 engine, MB7229 transmission.

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1 fault write-ups. Important. No recall on the list.

If you know the year, pick it. Faults for other years drop out of the list.

Before you buy

Known faults

1 important faults

7G-Tronic (722.9): mechatronics and conductor plate

expensive

In the Mercedes 7 speed 722.9 automatic (7G-Tronic / 7G-Tronic Plus) the mechatronics unit and the conductor plate (Leiterplatte) age over time: jerking on shifts, delayed engagement, a "Getriebe schützen" message, and fault codes on the gearbox electronics.

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The repair is typically replacing the mechatronics unit or the conductor plate together with an oil change: not the whole gearbox. The complaint is most common on the longitudinal platforms from around 2005 to 2015 (C/E/ML and the early GLC).

The 9G-Tronic (725.0) is a different design; this applies only to the 7G.

between 100,000 and 220,000 km

What to check

  • Try it cold and warm: a delayed 1 to 2 or 2 to 3 shift is suspect
  • Watch for the gearbox warning or the "Getriebe schützen" message on the dash
  • Ask for a fault code read on the gearbox controller (not just the engine codes)
1 more steps in the write-up

Checklist

Mercedes-Benz CLS-Class CLS 63 AMG

First what you would check on any car. Then the faults of this model.

Before you buy

Checklist

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On every car

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Faults of this model

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Engine and transmission

M156E63

386 kW (525 HP) · petrol

MB7229 · 7G-Tronic / 7G-Tronic Plus, longitudinal (Mercedes 722.9 / NAG2)

automatic · 7 speed

Torque limit700 Nm
MakerMercedes-Benz

We built the code from the model and the gear count. The factory sheet does not state it.

Variant data

What is in this version

Factory data

Trim
CLS 63 AMG
Body
saloon
Fuel
petrol
Transmission
automatic
Engine size
6208 cc
Power
378 kW (514 HP)
Drive
RWD
Production
2004–2008

Factory service interval

The manufacturer specifies this for this version. Of the mileage and the time, the one that comes first is the one that counts.

  • Air filter

    • 60,000 km or 4 years

  • Cabin (pollen) filter

    • 30,000 km or 2 years

  • Brake fluid change

    • first: 3 years, then 2 years(first change at 3 years, then every two years)

  • Spark plugs, petrol

    • 60,000 km or 6 years
All C219 versions

Information, not an expert opinion

We write the descriptions, and we put the source next to them. A person reviews them before they go out. They are still information, not a technical expert opinion.

  • A fault on the list does not mean the car you are looking at has it.
  • A fault missing from the list does not mean the model is fault-free. Write-ups are made model by model. Not all of them are done.
  • You decide whether to buy. This is no substitute for an inspection. That needs a workshop and a history check.
Details in the terms