Updated 24 July 2026 · By Old Bangers Editorial
Short answer: The R107 (1971–1989) and R129 (1989–2001) are the two great classic Mercedes SLs. The R107 is the elegant, simpler, long-lived icon — robust, appreciating and the more “classic” of the two. The R129 is the more modern, faster, tech-laden car, with V8 and even V12 options, still relatively affordable but rising — the catch is more electronics and complexity to maintain. As a rough guide, tidy R107s run from around £10,000 into the £40,000s depending on model and condition, while the R129 typically offers more performance per pound. Buy the R107 for timeless style and strong values; buy the R129 for more car, more pace and modern usability — and budget for its electrics.
Both are open-top Mercedes built to last, and both are now firmly collectable, but they come from different eras and suit different buyers. Here’s how they compare.
R107 vs R129 at a glance
| Mercedes SL (R107) | Mercedes SL (R129) | |
|---|---|---|
| Years | 1971–1989 | 1989–2001 |
| Character | Elegant, simple, classic | Modern, fast, tech-laden |
| Six-cylinder | 280SL, 300SL | 280SL, 300SL, 320SL |
| V8 | 350/380/420/450/500/560SL | 500SL |
| V12 / AMG | — | 600SL (V12); SL60/SL73 AMG |
| Roof | Soft top + removable hardtop | Soft top (power) + hardtop; pop-up rollbar |
| Typical UK values | ~£10,000 – £45,000+ | More affordable to buy; rising |
The two eras
The R107 ran for an extraordinary 18 years, which tells you how right Mercedes got it. Early cars used the 350 and 450 V8s and the 280 straight-six; later came the 380, 420, 500 and 560 V8s, and the 300SL six (from 1985) that’s often cited as the sweet spot for usability. It’s beautifully engineered, relatively simple, and its removable hardtop makes it a genuine all-year car. Values have climbed steadily — per Hagerty UK, entry-level cars start around £10,000, good V8s sit in the £13,000–£25,000 range, and the best command £35,000–£45,000.
The R129 replaced it in 1989 and moved the SL into the modern age: safer, faster, and packed with technology for its day, including a pop-up rollover bar and sophisticated electrics. It offered six-cylinder (280/300/320SL), V8 (500SL) and range-topping V12 (600SL) engines, plus the rare and rapid SL60 and SL73 AMG models. As a used buy it has generally been more affordable than the R107, though values for good, well-documented cars — especially V12s and AMGs — have been rising. The trade-off is complexity: there’s far more to go wrong electrically.
Which one should you buy?
Buy the R107 if you want the classic Mercedes SL experience — timeless styling, mechanical simplicity, strong and steady values, and year-round usability with the hardtop on. It’s the one most people picture when they think “classic SL”.
Buy the R129 if you want more performance, more refinement and more modern-car usability for your money — and the appeal of a V8 or V12 at a relatively accessible price. Just go in with your eyes open on the electrics, and buy the best-documented example you can.
On both, condition and history beat specification, and a car with a genuine service record is worth paying more for. This isn’t financial advice, but the R107 in particular has a strong track record of holding value — buy the best you can and treat any appreciation as a bonus. See our guide on whether classic cars are a good investment.
See the wider market
Live medians by era and marque, updated monthly, with the working shown.
Mercedes SL R107 vs R129: FAQs
Is the R107 or R129 the better classic SL?
It depends on what you want. The R107 (1971–1989) is the more classic, simpler car with timeless styling and strong, steady values. The R129 (1989–2001) is more modern, faster and more refined, with V8 and V12 options, and is often better value to buy — but has more electronics to maintain. Neither is objectively “better”; it comes down to classic character versus modern ability.
How much does a classic Mercedes SL cost?
For the R107, UK buying guides put entry-level cars around £10,000, good V8s in the £13,000–£25,000 range, and the very best at £35,000–£45,000 or more. The R129 has generally been more affordable to buy, though good examples — and especially the V12 600SL and AMG models — command significantly more. Condition and history have a big effect on where a car sits.
What should I check when buying an R107 or R129?
On the R107, corrosion is the priority: inspect floors, sills, wings, front valance and jacking points, plus the hardtop. On the R129, the mechanicals are robust but the electrics and the powered roof are the main concern, so test every function, and remember that V12 servicing is expensive. On both, buy on condition and a documented history rather than mileage.
Does the R129 have a V12?
Yes. The R129 range included the 600SL, powered by a 6.0-litre V12, alongside six-cylinder and V8 options. AMG also produced the rare SL60 and SL73. The earlier R107 was offered only with straight-six and V8 engines, never a V12.
Free checklist: The Classic Car Buyer’s Inspection Checklist
Print it and take it to the viewing — rust hotspots, MOT-history red flags, paperwork and the 8 walk-away signs. Enter your email and we’ll send you the PDF.
