Your current brakes meet the German standards for Autobahn driving, which, if you've not had the pleasure, is just about all out full throttle in heavy traffic with 100 mph differential speed between lanes.....

You don't need improvements, the stock ones are more than adequate for North America.

If they don't knock your head on the dashboard in emergency stops, they need work.

Peter

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1972 220D ?? miles
1988 300E 200,012
1987 300D Turbo killed 9/25/07, 275,000 miles
1985 Volvo 740 GLE Turobodiesel 218,000
1972 280 SE 4.5 165, 000 - It runs!