I'm not thoroughly familiar with which of these V8 models have the double row chain, and which don't. But, if you do not have the double row chain, it can be upgraded to the double row chain to add durability. If yours is already a double row, the important thing is to replace the chain AND guides periodically. The chain itself is usually not the cause of the problem. Once a guide gets brittle and breaks, it typically jams the chain causing it to break. If there is such a thing as a stronger chain, it probably would not prevent breakage in the event of a broken guide.

The safe thing with the V8 is to replace the guides and chain if there is any doubt at all. The sixes and fours are expensive enough to correct chain failure damage, the V8's have astronomical repair bills when this happens. If there is ANY MB engine that warrants timing chain and associated component replacement for preventive maintenance reasons, it is the V8's.

Best of luck,