1973 Mercedes-Benz 450SL, one-family car with hardtop and a rebuilt transmission, no reserve

Why we picked it

Why we picked it: an early chrome-bumper 1973 450SL that has stayed in one family, with its color-matched hardtop and a replacement soft top. The seller lists a rebuilt transmission, a rebuilt power steering box, a new radiator and fuel pump, a rebuilt alternator, a 2022 ECU and all eight injectors, plus an electronic ignition conversion. It sells on a clean Maryland title per the listing.

The seller also notes rust in the lower fenders and rockers, non-working A/C, worn window regulator teeth and paint chips. It was bid to $5,750 with no reserve and ends October 21. That is just over 40% under the middle of recent driver sales, and bids usually climb on the final day.

The value check

When we found it, the bid was $5,750. Comparable cars in the same condition have sold for $4,600–$15,000, so the middle of the market is about $9,800. That put this car 41% under.

Compared with early 450SL driver sales in the last two months: $4,600 for a 1974 on Cars & Bids, $11,860 for a 1974 on BaT and $15,000 for a 229k-mile 1973 on BaT. Low-teens is the typical driver price.

Where the numbers come from:

• 1973 450SL, 229k mi, BaT Sep 2026, $15,000
• 1974 450SL, BaT Sep 2026, $11,860
• 1974 450SL, Cars & Bids Sep 2026, $4,600
• 450SL R107 market

What to check

• Rust is noted in the lower fenders and rockers; also check the floor pans, jack points, the trunk floor and under the battery
• The early D-Jetronic injection is complex; confirm the car idles and runs cleanly when warm
• Timing chain and guide condition on the M117 V8 is key; ask for records
• A/C is inoperable and the driver window regulator is worn
• Ask the seller which service records actually come with the car

Making it drive like new

Fix the rust properly, then fit modern Bilstein dampers and bushings, upgraded brakes, a refreshed or converted fuel system, a modern A/C compressor and LED lighting for a comfortable restomod SL cruiser.

How it ended

It sold for $7,250 on Oct 21, 2026, against a market value of about $9,800 when we found it.