Ignition Coils on C280

I'm considering a '94 C280 (among several other used car options) It has 200K, a new trans.... the owner says he replaced two ignition coils. This makes he assume there will be others to replace. I've found the parts online. Is this a difficult job for a diy-er with reasonable common-sense but without a lift and lot of high-end tools?

Thanks

The car only has three coils. They are easy to replace. The engine wiring harness is a different story- check the wiring, if the insolation is falling off and the wires are showing, it needs a new one.