Steering wheel turns left, when car is started up. It moves easy when parked

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My 08 MC/S turbo had the evaporator &dryer replaced. Now the steering wheel moves easily when parked, engine off. When started, the car wants to turn left, without the driver moving the st wh. Also, when the engine is cut off, the wipers come on and will not turn off using the lever, and the radio will not shut off automatically, when the driver door is opened. It seems like my key does not slide in as easy now. I haven't checked to see if the headlights, etc still come on at dusk and go off by themselves. I'm taking it back to the mechanic tomorrow morning, (Thursday) June 21. I appreciate your help. I'm so upset about my car. I've owned it since bought new in 2008, and been it's only driver. It's one of the last things my husband bought me before his death, Feb, 2011. I hope you can help me. Thank you.