Radio code # for 2002 Mercedes-Benz SLK-Class

what is the radio code number?

How would any of US know YOUR radio’s code? It is keyed the the car itself and all are different.

keyed to vin number I think

Carl look in your manual or go to a Mercedes dealer with proof that the vehicle is yours. You are not going to get the code from the web.

And if this radio is from a different car ,ebay or junk yard purchase, you’ll need the VIN # from the car it came from and proof you legally purchased it.

Did you ever have work done at the dealer? If so, check if it’s listed on your receipt. I discovered that my Acura receipts had that information for my previous car, so maybe other makes do that as well.