Background
It could be argued that Washington DC based lawyer, Ralph Nader, did as much to shape the R107 SL Mercedes-Benz as anyone in Stuttgart. In no small part, Mercedes-Benz had Nader to thank for its runaway success in the crucial North American market. Princeton and Harvard Law School trained hot-shot lawyer, Nader, released a book in 1965 entitled “Unsafe at Any Speed.” Nader’s exposé book focussed on the appalling safety record of the Chevrolet Corvair. By association, however, it implicated all of the US’s main motor manufacturers for failing to introduce available safety measures, merely on the basis of cost.
Nader’s tome represented a tipping point for the US population’s awareness of automotive safety and is widely credited for ushering in a safety-centric regulatory structure that would endure for a couple of decades. On the back of this pivot many manufacturers were pre-emptively cancelling upcoming convertible models in the expectation that they would prove impossible to build to the draconian regulations or be banned outright. Far off in Stuttgart Mercedes-Benz weren’t immune from these concerns. They had a follow up to the W113 “Pagoda” model in the schedule and the board were pushing for it to be a hardtop-only release. Thanks mostly to cajoling and persistent lobbying by then head of R&D, Hans Scherenberg, an open convertible with a detachable hard-top was finally green-lit. The board insisted on a caveat, however - this convertible would need to be safer than any built to date.
Along with built in crumple zones the R107 premiered in 1971 with a windscreen surround that could support the weight of the car in the event of a roll over. Along with significant internal strengthening, the windscreen was bonded in giving the new car’s windscreen surround 50% more rigidity than the one in the W113. An unforeseen side effect of Nader’s book was that many other companies had cancelled their convertibles, effectively gifting this market segment to the SL. The R107 went on to become the company’s second most long-lived model after the G Wagen and sold well over 300,000 units during its 17-year production life, dwarfing the 49,000 achieved by its esteemed predecessor. Of course, the car enjoyed great success in the USA, too, with over 60% of R107’s being sold there.