The curse of the key / ignition barrel has struck me today. When I went to turn the car on, after just turning it off 5 minutes before, the key would not turn the barrel at all and the steering lock is on. The key comes out of the ignition & is working all the door locks as before. I tried squirting WD40 in the key hole & jiggled the bloody key while moving the steering wheel back & forth until my fingers were raw, but no joy. I already have a good used barrel & key from my 190D 2.5 donor car (is this the same as a 190E 2.6 key & barrel?) so what do I do next? The car is still parked, immobile, steering lock on & stuck in Park where I turned it off & I'd prefer not to leave it there too long!