No discussion of the W124 Zone is complete without mentioning the . Born from a collaboration with Porsche, this wide-body W124 housed the 5.0L V8 from the 500SL.

The 300E (M103) is the "gateway drug." Reliable, torquey, and reasonably simple. The later 320E (M104) produces more power (217 hp) but suffers from the infamous wiring harness disintegration . If you see a 1994-1995 E320 in the , assume the engine harness is dust. Factor $800–$1,200 for a new one.