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Good parts support is why an R107 remains a usable classic instead of a sculpture. Bad parts choices are how a simple soft-top reseal turns into three orders and a leaky winter. This is how I decide where to buy, and when the Mercedes star on the box is worth it.
Mercedes-Benz dealers and Classic Center channels
Genuine parts, correct supersession chains, and list prices that make you sit down. I use them for fussy trim, certain seals, and anything where aftermarket fitment has a known bad reputation. Ask about superseded numbers — “NLA” on a forum thread from 2014 is not always true today.
R107 / SL specialists
Vendors who live in the 107 chassis stock hardtop seals, top parts, chrome, and mechanical pieces with tribal knowledge. When a generic catalog shows three conflicting numbers, a specialist invoice that says “this fits your chassis end” saves weeks.
Pelican Parts, FCP Euro, RockAuto, and peers
Best everyday sources for filters, brakes, ignition, suspension wear items, and OE-supplier brands (Bosch, Mann, Bilstein, Behr/Mahle, and friends). Always read the brand column. The cheapest listing is sometimes a no-name copy of a no-name copy.
Used parts and breakers
Hardtops, consoles, seats, body panels, and rare interior pieces often come from parting cars. Inspect for cracks, stretched mounting holes, and rust you are about to import into your garage. Structural used metal needs careful measuring.
eBay and marketplace sellers
Fine for commodity items with easy returns. Risky for fuel distributors, electronic modules, and “refurbished” parts with anonymous warranties. Counterfeit soft-top material shows up — prefer known marque sellers with photos of the actual item.
Genuine vs OE vs aftermarket
- Genuine MB: fit/finish critical, or aftermarket has burned people on that SKU
- OE supplier: often the same factory without the star — my default for many mechanical parts
- Aftermarket: acceptable for some wear items; I avoid mystery brake hydraulics and bargain fuel parts
What I spend premium money on
- Fuel hoses, filters, accumulator — not stranding me
- Brakes and steering coupler — safety
- Cooling parts — aluminum and iron engines both hate heat
- Top seals — rust prevention is cheaper than welding
NLA and reman
When discontinued: supersessions, specialist remanufacturers (fuel distributors, calipers), carefully inspected used, or fabrication for simple brackets. Club and forum knowledge goes stale — verify the vendor still answers email before you wire money.
A simple ordering habit
Match parts to the chassis and engine number, not to “560SL universal.” Keep invoices. The next owner (or future you) will want the paper trail almost as much as the part.
