no i got stock bundts on. tire size not sure of will check.
The Wheel & tire sizes for a stock 380SL are
14x6.5 30 205/70R14 which means the wheels are 14" diameter, 6.5" width and have an offset of 30mm. If yours are indeed stock, this is what they are.
The tire size noted above is designed to work well with this suspension and fit in the wheel wells nicely. If you put larger tires on those rims, they can rub, both front and rear.
On my recently purchased 380SL the Previous Owner had 245/70R14's up front and 225/70R14's in the back on stock rims.
I think the PO wanted the staggered look and probably found out too late that the 245's wouldn't even fit in back, for they ended up in front, at least your could drive the car, and of course it looked weird with these huge gummy tires. All 4 tires rubbed on moderate bumps and the fronts rubbed on minor bumps when turning.
The simple solution was to just install 205/70's on the stock rims, but since I wasn't keen on them anyway, I installed 3rd party 15" rims with 205/65's which match exactly the outer dimentions of stock 14"wheels and tires.
There is a size envelope inside the wheel wells you need to stay within on these cars in particular, or your will be rubbing.
Try this website
Wheel / tire size calculator / comparer - BIGCUSTOMWHEELS
On the left side you plug in the OEM spec's I've given above, on the right you can plug in any combination of wheel and tire sizes until you get the new one to match the 14" ers closely, then scroll down and you will see an analysis of you new size as compaed to OEM, it will tell you if the new combination will fit or not.
If you are going to keep the 14" bunhts, and the tire sizes are bigger than 205/70, just put on stock tires and your fine.
If you already have stock tires, then you have a problem I haven't seen before in the forums. I'd bet your tires are oversized on first guess.
Attached are a couple of pictures, my SL with oversized tires on bunhts as purchased, then same car with 15"wheels and tires that match the orginal design outer deminsions. Personal opinion only, but oversized tires don't work well visually as they do on other cars.