Mercedes-Benz CL 63 AMG Review: Model | CL 63 AMG | Car Buyers Guide

2009 Mercedes C 63 AMG Review

Even in standard trim, Mercedes’ C63 AMG is a serious piece of kit. When you hear that a top-class tuner such as Edo Competition has treated the C63 to an extensive overhaul, however, you know it’s going to be something special.

As standard, the C63’s naturally aspirated, 6.3-litre V8 engine produces 457hp, but following tweaking by the team at Edo, this has now been boosted to a whopping 555hp. This has been achieved by the addition of high-flow catalytic converters, new air filters, a recalibrated ECU setup and a stainless steel performance exhaust system, along with several other choice mods. Edo is keen to stress that its innovative exhaust system plays a major part in boosting the car’s performance as well as its aural impact. It utilises a butterfly valve that allows exhaust back-pressure to be monitored and even adjusted via an integrated 70mm exhaust flap.

What does that mean in practical terms? Well, this provides the driver with a wider range of torque at low revs without restricting the car’s power output in top-end revs. So, how do the power gains reflect on the C63’s straight-line performance? 0-100km/h takes just 4.3 seconds, and it won’t max out until a staggering 320km/h (for the record, its top speed is normally limited to ‘just’ 249km/h). In contrast to most tuning specialists, Edo Competition has only treated the car to a subtle exterior makeover, but we have to admit the end result is still incredibly eye-catching. Edo has dropped the C63 onto a set of matt-black, lightweight, 19-inch alloy wheels and tinted the rear windows, but aside from this and a set of carefully placed Edo stickers, it has left the car’s exterior pretty much as Mercedes intended. The German firm is also offering a range of custom interior upgrades for the car, but these have to be ordered as extra options.

Engine: Edo has squeezed an incredible 555hp out of Mercedes’ 6.3-litre V8 engine, which is some 98hp more than the standard lump produces

Wheels: The car is fitted with a set of Michelin-shod, matt black, lightweight 19-inch alloys that perfectly complement the Mercedes’ dark paint scheme

Window: Tinted rear windows complete Edo’s Goth-pleasing exterior makeover

Rear: To the rear, you’ll find a high-performance stainless steel exhaust system incorporating butterfly valves, which greatly improves the C63’s engine note

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