Spark plug wire diagram on 1999 Mercedes-Benz SL500

What I nee dis the letter diagram the spark plu wires need to be in. Im replacing them and dont think the mechanic placed them in the right order. If somneone has one or know the alphabetical or please let me know. Thanks

Asked by for the 1999 Mercedes-Benz SL500
repl one at a time as to not get lost on firing order or mark them with tape 1st