Bosch or Hella lights is the only way to go, why put cheap chinese lights on an older mercedes, the thing to do is wait for a nice used set, i scored 2 sets in the past 8 years, one set was craigslist, a guy had bought a brand new Bosch set from performance but then sold the car my cost was $350 not bad, i think they go for like $700, the next set i got form a salvage yard, a nice w124 had been totaled and the lenses were cracked my cost 30 for the pair!
it turns out i had a pair of Bosch lenses sitting around for years so voila!!
Lenses were 60 a piece.
Save your money there are good lights out there to be had.

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W123 1985 300TD naturally aspirated