Buyer’s guide: Mercedes-Benz SL (R230)

| 28 Jan 2025
Classic & Sports Car – Buyer’s guide: Mercedes-Benz SL (R230)

Why you’d want a Mercedes-Benz SL (R230)

The brief for the Mercedes-Benz R230 SL, begun in 1996, was to be lighter, faster, roomier and more appealing than ever.

It succeeded, even though at launch the SL500 was still a hefty 400kg heavier than a Porsche 996.

The design team under boss Peter Pfeiffer achieved styling that didnʼt just look sleek, it really was, with a drag coefficient of just 0.29Cd.

Pioneering features included the first road-car application of Mercedes’ Sensotronic Braking System (SBS): removing any physical connection between pedal and pads was a big step, but it saved weight and enabled the ECU to link with suspension sensors to allocate braking to each wheel. It also led to a costly recall when issues arose.

Active Body Control (ABC) combined conventional spring/dampers with a hydraulic servo to manage roll, with switchable modes.

The folding ʻVarioʼ roof used 11 hydraulic cylinders to operate in 16 secs; a Panorama glass roof was a desirable extra.

The seats could be heated, cooled and massaging, but there was no longer a rear bench, just lockable boxes.

Autocar applauded the superb automatic ʼbox, devoid of paddles or buttons, and the sharp, accurate steering, saying: ʻThe technology just refuses to allow the car to roll in corners.ʼ

Classic & Sports Car – Buyer’s guide: Mercedes-Benz SL (R230)

More frugal Mercedes-Benz SLs were envisaged for markets with punitive taxes on large engines: 23 SL320s were built in 2000-ʼ01, but it wasnʼt until 2007 that the 280 then 300 were added, with just 1914 built to 2011.

The 350 was popular because it still went well, but was cheaper, with less kit, than the big-selling 500.

If that wasnʼt enough, there was the twin-turbo V12 600 plus AMG variants of both the V8 and V12, building up to insane power for the SL65 Black Edition.

The Sport Pack was popular, with AMG alloy wheels and skirts. Keyless Go with a gearknob start button became standard in ʼ06.

Other high-tech extras included Distronic proximity control, Comand infotainment control, automatic accident reporting, electronic tyre-pressure monitoring and more.

Four trims included two types of leather and five interior colours, with wood veneers in walnut, chestnut or black ash.

Among the safety features were various airbags and a pop-up rollover bar. Later cars even had Airscarf heaters built into the headrests.

Despite the complexity of the Mercedes-Benz R230 SL, keen DiY owners happily tackle most issues at home and often share their tips on Facebook or YouTube.

Images: James Mann


Mercedes-Benz SL (R230): what to look for

Classic & Sports Car – Buyer’s guide: Mercedes-Benz SL (R230)

Trouble spots

Please see above for what to check for when looking at R230 Mercedes-Benz SL classic cars for sale.

Classic & Sports Car – Buyer’s guide: Mercedes-Benz SL (R230)

Engine

Smart presentation and slightly worrying complexity – there’s a lot under the bonnet, and much of it is hidden.

Many enthusiasts happily work on their V6 and V8 Mercedes-Benz SLs; only the brave tackle the V12, which is a very tight fit so many jobs require the engine out.

The front battery is reserved for starting the engine.

Classic & Sports Car – Buyer’s guide: Mercedes-Benz SL (R230)

Suspension

This pump supplies the Active Body Control suspension units with hydraulic pressure, to add/remove roll stiffness in milliseconds. Specialists can repair it.

Classic & Sports Car – Buyer’s guide: Mercedes-Benz SL (R230)

Vario roof

The clever if super-complex Vario roof is superb, but fails with age and neglect.

Dedicated specialists can work wonders on most faults without huge expense.

Classic & Sports Car – Buyer’s guide: Mercedes-Benz SL (R230)

Gearboxes

Only Mercedes-Benz SL350s had an automated manual option; others got a full or paddle-shift automatic.

Check that all modes work, the fluids are clear and the shifts are smooth.

Classic & Sports Car – Buyer’s guide: Mercedes-Benz SL (R230)

Second battery

Under the boot floor is a second battery powering most of the electronics and lots of ECUs.

Damp in here (usually from roof leaks) is common and wreaks havoc.


Mercedes-Benz SL (R230): before you buy

Classic & Sports Car – Buyer’s guide: Mercedes-Benz SL (R230)

The Mercedes-Benz SL350 and SL300 are the least complicated and most affordable to own, so are understandably popular as a result, though the V6 is also a little more troublesome than the bigger engines.

Premature balance-shaft wear is common on 2006-on V6s, which is expensive to replace; the plastic variable inlet manifold lever also fails.

The SL500s had a 155mph speed limiter as standard, but at extra cost it could be deleted.

The V8 is easier to work on than the V12, which is complex and a tight fit, requiring the engine out for some jobs that are achievable in cars with a V8 or V6.

The V12 is super-smooth and spectacularly fast, so refined it feels effortless – the V8 is more raw and involving.

Classic & Sports Car – Buyer’s guide: Mercedes-Benz SL (R230)

A few SL63 AMGs had head-bolt issues, but otherwise they will last 200,000 miles; SL55s can do 400,000 with ease.

Itʼs worth noting that Brabus tuned all models from the 350 to the 600 – its ultimate 6.3-litre produced 750bhp and 811lb ft torque, and was restricted to 350kph (217.5mph).

The strong DiY following for R230 Mercedes-Benz SLs is backed up by an increasing number of specialist firms focusing on key issues such as the Vario roof, ABC suspension strut joints and electronic components, all helping to bring down the cost of repairs – it is an encouraging trend.

A humming noise when running may be failing ABC accumulators; factory replacement parts for ABC will be the 2006-on updated components with improved durability, interchangeable with earlier parts, so itʼs easy to update early cars to the ultimate ABC spec.


Mercedes-Benz SL (R230) price guide

Restoration/average/show

  • SL350 & 500: £2000/5000/15,000
  • SL55 AMG: £7000/12,500/25,000
  • SL63 AMG: £10,000/17,500/35,000
  • SL65 AMG: £15,000/25,000/50,000
  • Black Edition: £250,000/300,000/350,000
     

Prices correct at date of original publication


Mercedes-Benz SL (R230) history

2001 310bhp SL500 V8 launches in July; production begins in October, when the 476bhp supercharged SL55 AMG is added

2002 242bhp SL350 V6; SL55 AMG 500bhp

2003 493bhp SL600 V12 (4600 built); 7G-Tronic transmission for SL500

2004 612bhp SL65 AMG added

2006 Facelift: three-slat grille, quad-cam 268bhp V6 for 350, 383bhp V8 for 500 (SL550 in USA), 510bhp for SL600 and SL55

2008 Major facelift: new lights, single-slat grille, 231bhp SL280 added, 350 up to 311bhp; 518bhp SL63 AMG replaces SL55

2009 SL280 renamed SL300; SL65 AMG Black Edition fhc added (350 built)

2010 SL600 and SL65 AMG end

2011 R230 replaced by R231


The owner’s view

Classic & Sports Car – Buyer’s guide: Mercedes-Benz SL (R230)

“As a teenager I once got a lift in an SL500,” recalls Giles Clayden. “When the owner floored it up the dual carriageway I was hooked, and said to myself, ‘One day, I’ll have one of these.’

“Once I had acquired the funds, I started researching them and realised that the last of the pre-facelift cars should be the most reliable and, if I keep it a long time, the values should go up.

“I was put off a bit by the Facebook groups at first, because people only tend to write about the problems with the cars, but if you use them and look after them, they are actually very reliable.

“I’ve had this SL500 Sport for 18 months now. It’s not my main transport, but I don’t want to suffer problems with it through lack of use, so I am trying to use the car all year round to keep everything working as it should.

“It’s such a great drive, it’s nice to have an excuse to take it out!”


Also consider

Classic & Sports Car – Buyer’s guide: Mercedes-Benz SL (R230)
Classic & Sports Car – Buyer’s guide: Mercedes-Benz SL (R230)

The Jaguar XK/XKR (left) and Maserati 4200 are possible alternative buys

JAGUAR XK/XKR

Pretty, and fast in R spec, the Jaguar XK came of age with Ian Callum styling and an aluminium shell. The 4.2 V8 grew to 5 litres in 2009, and the 2012 XKR-S had AMG performance levels. Great value.

Sold 2006-’14 • No. built 27,612 • Price now £6-40,000*


MASERATI 4200

Giorgetto Giugiaro-styled 4.2 V8 came as Coupé or Spyder, manual or paddle-shift, with 395bhp GranSport from ’04 giving 180mph. Beware clutch slip, rusty subframes/heater matrix, damp carpets.

Sold 2001-’07 • No. built 13,423 • Price now £6-40,000*

*Prices correct at date of original publication


Mercedes-Benz SL (R230): the Classic & Sports Car verdict

Classic & Sports Car – Buyer’s guide: Mercedes-Benz SL (R230)

Stylish, sophisticated and super-refined, yet scary to repair, the Mercedes-Benz R230 SL can be immensely satisfying to own and drive, but very expensive when things go wrong.

Buy carefully, look after it and use all of the enthusiast/boffin support to keep it in fine fettle, and you should have a great SL experience.

Just remember that the bigger the engine, the more complicated and costly it will be to maintain.

 

FOR 

  • The most advanced production sports car of its day
  • Performance from sublime to sensational
  • A cabin that could deliver you unruffled after driving all day

 

AGAINST

  • Sophistication came at a price, with so much that can go wrong
  • Low mileage can be just as damaging as high

Mercedes-Benz SL (R230) specifications

  • Sold/number built 2001-’11/169,433
  • Construction steel monocoque, aluminium panels (carbonfibre on Black Edition)
  • Engine alloy, injected, ohc 4996/5439cc V8, 3724cc V6 or 5513/5980cc twin-turbo V12; dohc 2996/3498cc V6 or 4996/6208cc V8; 231bhp @ 6000rpm-661bhp @ 5400rpm; 258lb ft @ 3000rpm-737lb ft @ 2200rpm
  • Transmission five/seven-speed auto or six-speed semi-auto, RWD; LSD on SL63/65
  • Suspension multi-link, ABC struts f/r (coils, telescopics for 350)
  • Steering power-assisted rack and pinion
  • Brakes ventilated discs (composite on AMG), with servo and ABS
  • Length 14ft 10½in-15ft 1in (4535-4589mm)
  • Width 6ft 5in (1960mm)
  • Height 4ft 3-3½in (1298-1310mm)
  • Wheelbase 8ft 4¾in (2560mm)
  • Weight 3861-4565lb (1755-2075kg)
  • 0-60mph 7.2-3.9 secs
  • Top speed 155-210mph
  • Mpg 15-25
  • Price new £62,885-147,960 (2006)

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