1979 Mercedes-Benz 450SL owned by one family for 45 years, no reserve, bid at $500

Why we picked it

This 1979 450SL in Classic White over red leather has been in one family for 45 years. It comes with its color-matched hardtop and the factory toolkit and literature, and it has a clean Minnesota title. The seller says it has always been parked in a climate-controlled garage and has needed little beyond routine maintenance. In 2023 the passenger-side exhaust manifold and catalytic converter were replaced. It has the 4.5-liter M117 V8 and a 3-speed automatic, and 84,800 miles are shown.

The seller lists oil seeping from the oil pan, timing cover and rear main seal, transmission fluid leaks at the input and tail shafts, a power steering leak, and a worn soft top with yellowed windows. Similar driver-grade 450SLs sold for $5,500 to $11,860 this fall. Bidding is at $500 with no reserve and ends November 9. Bids usually climb near the end, so set a firm limit.

The value check

The current bid is $1,000. Comparable cars in the same condition have sold for $5,500–$11,860, so the middle of the market is about $8,680. That put this car 88% under. Bids usually climb in the final hours, so the discount will likely shrink.

Driver-quality 450SLs with similar needs sold for $5,500 to $11,860 between August and September 2026 (Cars & Bids, Hagerty, Mecum and Bring a Trailer). Clean examples sold for $18,000 to $41,000, so we did not use them as comparables.

Where the numbers come from:

• Classic.com 450SL sold results
• 1979 450SL, Mecum Sep 2026, $9,900
• 1977 450SL, Cars & Bids Sep 2026, $5,500
• 1974 450SL, BaT Sep 2026, $11,860

What to check

• Bids usually climb a lot in the final hours; the $500 bid is not a real price
• Fixing the oil, transmission and power steering leaks can add up, and the rear main seal requires pulling the transmission
• Check the single-row timing chain and guides on the M117 V8; failing plastic guides are a known weak point
• Look for rust at the windshield frame, the rocker panels, the battery tray and the floors under the carpet
• K-Jetronic fuel injection can run poorly after sitting; check the warm-start behavior and the fuel distributor
• Budget for a new soft top and rear window

Making it drive like new

An R107 makes a good comfortable cruiser. Fix the leaks, replace the timing chain and plastic guides, and fit fresh Bilstein shocks and new suspension bushings. Upgrade the A/C to R134a with a new compressor and condenser. A bolt-in modern head unit with Bluetooth and LED bulbs round it out without hurting the car's period look.