Drilling brake rotors, cutting grooves for the "gas" to escape, etc. all sounds nice but doesn't do a thing for braking power.

Total swept area contributes to stopping power. You can buy a good set of rotors for this car for about $36 (ATE) that will last just fine. I got 100,000 miles out of my front rotors on a 95 model E300D.

Don't go looking for fancy solutions to basic problems. You're just making some marketing person rich.