The E63 AMG was launched at a time when Mercedes was going through one of its periodic spells of excess. We were getting cars like the R63 AMG and such like and amid this filler, the true significance of the hot E-Class was somewhat drowned out. Besides, that engine was also fitted to the smaller C-Class saloon and estate which attracted all the column inches anyway. The V8 made a fantastic noise but could never match the sheer low-end torque of the old supercharged 5.5, so it at first seemed a bit of an odd fit for the E-Class. But then you drove it and revelled in directing 507bhp through the relatively modest 265/35 R18 rear tyres. It was fantastically quick but you really needed to rev the car and to get the most out of it you needed to manually flack away at the gearshift paddles that replaced the useless buttons of the E55.
The 2009 E63 AMG, easily distinguished by its square headlights, upped power to 518bhp and torque to 628Nm. This was enough to push the 1840kg E-class to 62mph in 4.5 seconds. You got three-stage adjustable dampers giving you a choice between a smooth and jarring and which most owners left in Comfort mode. The interior finish improved markedly over its predecessor with more metal dash trimmings, a chunky three-spoke steering wheel and grippy leather sports seats, as well as a console of AMG-specific buttons.
The big change came in 2012, though, when the 63 AMG was further revised to incorporate the 5.5-litre twin-turbo engine. As before, the list of exterior changes was quite subtle. Perhaps the exhausts are the most overt giveaway, especially if you've chosen the badge delete option, but there are a few other things that you'll need to look out for. Like the 18-inch ten-spoke AMG alloy wheels painted in titanium grey with 360mm brake discs peeking through the spokes. Plus the front wheel arches are 34mm wider with cut outs on the trailing edge. There's an AMG front grille and splitter and high-performance LED headlight units that offer absolutely remarkable night clarity. Flowing light elements within the headlamps ensure that the "four-eyed" look which is typical of the E-Class has been retained.
Insist on a full Mercedes dealer service history, especially for the most recent models whose lengthy warranty - effectively for the life of the car - is dependent on proper servicing by an authorised agent. Check that all the accessories work and watch out for cosmetic damage which can be expensive to correct. This is a big and heavy car, so early models might benefit from a suspension overhaul if body control feels less than up to scratch. Bushes and dampers do get tired after hard use. The engines, whether you opt for the normally aspirated 6.2 or the turbocharged 5.5, are reliable but do require regular servicing with particular attention paid to diligent oil maintenance, so walk away if this has clearly been neglected. Look for kerbed alloy wheels and paint chipping at the front and use these as negotiation points.
(approx. based on 2008 E 63 AMG) Set aside around £200 for a set of front brake pads and £110 for the rears and about £675 (excluding catalyst) for a factory exhaust system. A full clutch replacement would cost around £595, a radiator is about £345 whilst a starter motor can be found for £275. A new alternator would be in the region of £600.
Go for one of the 5.5-litre turbo cars and you get a V8 that develops 551bhp. That's enough to catapult two tonnes of car to 62mph in just 4.2 seconds and on to an electronically limited top speed of 155mph. The AMG RIDE CONTROL sports suspension features steel springs up front and a full air suspension system at the rear axle. Some 700Nm of torque arrives at said back axle via an AMG SPEEDSHIFT MCT-7 transmission which features four modes - "C" (Controlled Efficiency), "S" (Sport), "S+" (Sport plus) and "M" (Manual). In "C" mode, the ECO start/stop function is active, the shift action is softer and the car typically starts in second gear.
The engine and transmission are far more responsive in "S", "S+" and "M" mode; in addition, the ECO start/stop function is deactivated. An automatic double-declutching function for downshifting and the RACE START function are also featured.
If you can't run to one of these later turbocharged cars, don't feel hard done by. The 6.2-litre V8 engine is a classic and whether you opt for an early 507bhp or a later 518bhp variant, you're going to have a lot of fun. There's actually not a huge amount of difference in the way these cars drive, it's just that the interior of the later square-headlamped 'W212' series car feels a much nicer place to be.
The Mercedes-Benz E63 AMG started off as a somewhat overlooked curiosity but soon word got out that it was something a bit special. The early cars now look great value for money and that 6.2-litre V8 engine is one of the world's greatest production car engines. The same probably won't be said of its replacement, the 5.5-litre twin turbo installation, but it makes up for it in other regards. Here is a car that feels a better all-round road car than BMW's rather too in your face M5. It's still a pricey used choice but if you've got the funds, it's definitely worth your time. Strongly recommended.