ETS was STD equiptment & that only is a "braking" control traction system. ONLY 3 wheel speed sensors, both front wheels & a differential sensor.

ASR is both a braking & accelerator control system, can apply the brakes OR back-off the throttle opening to reduce torque. This system as well as most other systems use 4 wheel speed sensors.

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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)
Retired Moderator