accelerate problems

How about spark plugs and air filter replacement? You can get those estimates here https://repairpal.com/estimator/mercedes-benz/190e and locate a shop near you here https://repairpal.com/mercedes-benz-repair-in-minnetonka-minnesota

change your catalytic converter it will cost u abt $250

I was having the same problem with my 1991 Mercedes 190e. Replaced the battery and alternator and everything is moving along fine again. :)