Mercedes SL500
The R129 — a completely reengineered SL that introduced an automatic rollover bar and set the template for every SL that followed.
The R129 generation replaced the long-running R107 in 1989 with a thoroughly modern design, most famously introducing an automatic pop-up rollover bar that deployed in milliseconds if the car sensed an impending rollover — a genuine engineering first for a convertible at the time. It remained in production for twelve years with relatively modest changes, a testament to how right Mercedes got the original design.
History
Launched for 1990 (as a 1989 introduction) with a choice of inline-six, V8, and later V12 engines, the R129 was engineered alongside Porsche on certain chassis and suspension elements — a genuine cross-manufacturer collaboration unusual for either company.
A 1996 facelift brought revised headlights, taillights, and interior trim, along with the option of Mercedes' first electronic stability control on the SL — incremental but meaningful updates that extended the platform's competitiveness through the end of its run in 2001.
Notable Versions
SL500 / SL600
The V8 and V12 flagship variants respectively, the most powerful and most collected of the R129 range today.
AMG-tuned variants (SL60/70/73 AMG)
Factory AMG performance versions offering significantly more power, genuinely rare and increasingly collectible.
What to Look for When Buying
Key inspection points from experienced collectors.
The automatic rollover bar mechanism should be tested
A functioning pop-up roll bar is both a safety feature and an originality point — confirm it deploys and resets correctly.
Convertible top hydraulics are a known maintenance item
The complex power-top mechanism can develop hydraulic leaks with age — budget for this on a car with unknown service history.
V12 models carry meaningfully higher running costs
The SL600's V12 is more complex and more expensive to service than the I6/V8 variants — factor this into total ownership cost, not just purchase price.
Quick Specs
- Engine options
- 3.0L I6, 5.0L–6.0L V8, 6.0L V12 (varies by year/trim)
- Horsepower
- 228–389 hp (varies by engine)
- Wheelbase
- 99 in
- Weight
- ~3,800–4,300 lbs
- Transmission
- 4/5-spd automatic (manual offered on early SL300/320)
Market Price Guide
Approximate USA asking prices
Shop Parts
Find Mercedes SL500 parts on eBay
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Bring These to Your Inspection
A few inexpensive tools that catch what a walk-around alone won't
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Compression Tester Kit
Checks cylinder compression to catch worn rings or valve issues before you buy.
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OBD2 Code Reader
Reads check-engine codes the seller may not have mentioned — plug in before you even pop the hood.
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Magnetic Paint Thickness Tester
A magnet pulls weaker over filler/bondo than bare metal — a quick way to spot hidden bodywork.
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Telescoping Inspection Mirror & Light Set
See up into wheel wells and behind components without crawling underneath.
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Mercedes SL500 For Sale
2 listings currently available
