Lot B7573: 2006 Mercedes-Benz SL65 AMG

The SL65 AMG (especially the 2006 R230 generation with the M275 V12 biturbo) is an incredible machine, but it comes with some well-documented Achilles’ heels you should know about. Here’s what frequently goes wrong:

1. ABC (Active Body Control) Suspension — The Big One

The hydraulic ABC system is notorious for being the costliest weakness. Common failures include:

• Hydraulic leaks from lines, valve blocks, and struts
• ABC pump failure — a very expensive component
• Strut/shock leaks — replacing just the rear struts can run around $2,400 each (nearly $5,000 for the pair)

Many owners eventually convert to coil springs to eliminate the complexity, though this sacrifices the signature ride quality.

2. Engine Misfires & Ignition — The “Deadly” Issue

The M275’s ignition system can be problematic:

• Coil pack failures are common (this matches the FAQ on your listing!)
• Persistent random misfires under hard acceleration — one owner reportedly spent over $80,000 over 5 years chasing a misfire that occurs when stressing the engine above 5,000 RPM
• These can be tricky to diagnose since the V12 has two cylinder banks with separate ignition systems

3. Engine & Transmission Mounts

A classic R230 issue — the engine mounts fail and allow excess movement, which then destroys the transmission mount. The FAQ mentions this specifically! Best practice is replacing all three mounts together. You’ll feel this as increased vibration and harshness, especially at idle.

4. Turbo System & Oil Consumption

The M275’s twin turbos can suffer from:

• Turbo seal failures leading to oil consumption and blue smoke
• Oil makes its way into the intake plumbing

5. Vario Roof Hydraulics

The convertible top’s hydraulic system is another common failure point — pumps, cylinders, and lines can leak. Given this car is 20 years old, the original hydraulic fluid and seals are aging.

6. Fuel Tank Baffle

The internal baffle in the gas tank can break loose (~$2,600 repair), causing a sloshing noise and potential fuel delivery issues.

7. General Electrical Gremlins

• Parking sensors (front and rear) frequently fail
• Seat heaters and CD changer issues
• Various sensor failures

The Bottom Line for This Car

At 48,650 miles, this SL65 has relatively low mileage, but at 20 years old, age-related issues are just as relevant as mileage-related ones. The “Original & Highly Original” condition is promising, but I’d specifically want to verify:

• When were the coil packs last replaced? (If ever — they may be original!)
• Have the engine and transmission mounts been done?
• ABC system health — any warning lights, sagging overnight, or pump noise?
• Service history on the ABC fluid changes (should be every ~40k miles)

The asking price of ~$60K seems reasonable for the market, but budget $5,000–$10,000 annually for maintenance if you plan to keep it long-term. These are $180K+ cars when new with very complex systems!

Want me to find some comparable SL65s with more detailed service records, or dig deeper into any specific concern?