The firing order for the 1978 Mercedes-Benz 450 SL, which features a 4.5-liter V8 engine (M117), is 1-5-4-8-6-3-7-2. This means that cylinder 1 fires first, followed by cylinder 5, and so on in the specified sequence. The cylinder numbering typically starts from the front of the engine on the driver's side (left) and continues to the passenger's side (right).
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