1998 Mercedes Benz SLK230 Key will not turn in ignition

Try lubricating lock cylinder with WD40 or other light oil. Other tips for this common problem may be found at the following link..

https://www.2carpros.com/first_things/why_wont_my_ignition_switch_turn.htm



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You may be experiencing a failed ignition switch. A pretty common occurance on this model. Also if your steering wheel is locked solid (no movement at all) you may have a frozen steering wheel lock. This also will inhibit your key from moving in the ignition tumbler.