Sounds like a typical euro car of the time, as many of them had factory trailer hitches, because towing caravans (house trailers) is popular there, and the euros very often had front electric window but with rear wind windows.

Your'e fortunate to have all the euro and import history of the car, most have been lost by now on these cars.

You can pick up an English language owner's manual by calling the dealer, Classic Center or looking on ebay for a bit.

Likewise, a shop manual in English would be a good idea. Not expensive.

It sounds like this is a car well worth bringing back. Good luck with it.

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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)