jcdickson1, a 1996 E320 has a 104 engine (inline 6-cylinder) with 3 top-mounted coils ... one atop the spark plug for cylinders 2, 4 & 6. Ask the seller how he determined the engine needs an ignition coil when there are three coils. Asking price sounds reasonable. Best to have a PPI (pre-purchase inspection) performed by a MB-trained tech who knows that vintage MB automobile so you find out about any pending major repairs. Spring perches can be a problem.

V-6 engines started with the 1998 E320.

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Fred Hoelzle