The only limiting factor is the wire insulation & coil!! Also with this much gap you are pushing the coil saturation point beyond it's limits at higher RPM.
This WIDER gap has been used by most car companies for 15-20 years, so that there is a more complete combustion. THAT is why many cars now have direct coil ignition systems. However the OE Benz coil won't last long at that .080" gap. Neither will the cap, rotor, & wires!
.045"-.050" is a good gap & wont hurt your ignition system!
MERCEDES Benz Master Guild Technician (6 TIMES)
ASE Master Technician
Mercedes Benz Star Technician (2 times)
44 years foreign automotive repair
27 Years M.B. Shop foreman (dealer)
MB technical information Specialist (15 years)
190E 2.3 16V ITS SCCA race car (sold)
1986 190E 2.3 16V 2.5 (sold)