Intercity version..that'll mean the O 307 ?
When i looked up the official DB published pamplets from
1980's, impresssion is MB coin badge should be standard feature so
long as it's original MB body/cowl ?
Also, the styling of that era they didn't have black trim,
meaning the curved 2 piece windscreen then is more obvious. Yours
looks a more modern updated styling of this classic iconic bus from
the 60 to 70's era
It's an O 305 chassis that shipped with an O 307 (StÜLB) front
end, a common option for O 305s even in Europe.
The O 307 (StÜLB) front end did NOT ship with the pendant.