Thanks DuckMuck. I did some more searching and found out that Lee also recommends either of these sizes for the stock W124 15" rims:

195/65-15
205/60-15
215/60-15

I'll now thinking I'll probably go for the 205/60-15s, as you suggested.

Last question : My stock rims are 6.5 x 15, 49mm offset. These new rims come from a newer Mercedes they are 6.5 x 15, 37mm offset.

Given that I'll be putting on a wider tire, should I be ok with the offset difference?

__________________
Chris
2007 E550 4Matic - 61,000 Km - Iridium Silver, black leather, Sport package, Premium 2 package
2007 GL450 4Matic - 62,000 Km - Obsidian Black Metallic, black leather, all options
1998 E430 - sold
1989 300E - 333,000 Km - sold
1977 280E - sold
1971 250 - retired

"And a frign hat. They gave me a hat at the annual benefits meeting. I said. how does this benefit me. I dont have anything from the company.. So they gave me a hat." - TheDon