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The 450SEL 6.9 logically could have been called 690SEL, but followed the discreet precedent set by an earlier-generation flagship, the 300SEL 6.3. The new 6834cc V8 engine was developed from that unit, offering 286bhp. The 6.9 introduced hydropneumatic self-levelling suspension. https://t.co/HhIGIBbqLJ