Opting for the R800 performance package means increasing output to an impressive 800 PS at 6,800 rpm. Maximum torque is then limited at 1,050 Nm (774 lb-ft), considerably more than the 750 Nm (553 lb-ft) and 850 Nm (627 lb-ft) generated by the E 63 and E 63 S when stock.
Customers can also get the optional ceramic-coated downpipes with 200-cell sports cats, which add an extra 20 PS while further-boosting the soundtrack in Sport and Sport+ modes. Meanwhile, the noise levels in Comfort mode remain relatively the same as before, in both the E 63 and E 63 S.
As far as pricing goes, the R800 performance package will set you back close to €15,000 ($17,519) if you also go for the Vmax increase, TUV approval and engine and powertrain warranty (up to 3 years, 100,000 km / 62,000 miles), or just under €12,000 ($14,000) if you skip those steps.
In a straight line, the RENNtech E 63 S can cover a 1/4 mile in just 10.43 seconds, at 214 km/h (133 mph). That’s a personal best for any W213 E-Class, and an improvement over last year’s record time of 10.68 seconds posted by a 773 PS Mercedes-AMG E63 S at the Palm Beach International Raceway. However, that car only featured an ECU upgrade, whereas the R800-equipped one also came with a BMC air filter, BOV adapters, the previously-mentioned downpipes with 200-cell cats, a fuel system upgrade and upgraded turbo tech.