Airbag contact rings in the steering wheel.

The Mercedes Benz dealer in Buena Park California where I bought the 560SEC in 1996 gave me the repair order that explained that repair being made before the vehicle was given "Encore" (now certified pre-owned) status and being then offered for retail sale on their lot.

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1991 560 SEC AMG, 199k <---- 300 hp 10:1 ECE euro HV ...

1995 E 420, 170k "The Red Plum" (sold)

2015 BMW 535i xdrive awd Stage 1 DINAN, 6k, <----364 hp

1967 Mercury Cougar, 49k

2013 Jaguar XF, 20k <----340 hp Supercharged, All Wheel Drive (sold)