Len,
Hi. Nice to see you on our forum, I've read your posts on other forums. Personally, I prefer to see W113 cars restored instead of parted out. This is because:
1. I think they are one of the best classic roadsters. They have lots of classic styling points, are modern enough to be usable in modern traffic, and are very mechanically reliable (once properly repaired). They are great used cars.
2. There were only about 49,000 made over the 8 year build history. So, there is a limited supply! Why cut one apart when there are so few?
3. It's not my money being spent when other people restore a car, so it's easy for me to say it's a good thing! And it does take money, lots of money. When it comes time to sell the restored car, you seldom get all your money back. You might spend $10,000 to "fix up" the car, or $40,000 doing a total restore, and either way you probably won't recoup all the money spent when it comes time to sell. You can, it's just not common.
That being said, the parts are worth a lot, even though almost all parts are available new. The used parts can be sold for less than new parts, but still for a good price. I just don't like seeing a restorable car go to waste. Get them both and restore two cars!
Regarding the data codes:
The 250SL plate is not complete. It should have two color codes, not just the 304G (Horizon Blue). It should have a hard top color, unless it was specially ordered with no hard top. The data card will tell you that. The 491 indicates a US version car and the 503 indicates the left outside mirror (I would think the 491 would assume a left door side mirror!). The thrid line indicates chassis type (250SL), and left hand drive with manual transmission. The fourth line is assembly and build code numbers.
The 280SL plate shows 568H paint code for both the body and hard top, which is Signal Red. It's common for the 280SL to have matching body and hard top, but the 230SL commonly had contrasting colors. The 280SL shows the same two factory options (491, 503).
Regarding your restoration decision, you can use the last 3 or 4 numbers in the 4th line of the data plate to see if the car has "matching nubmers". You will see the last numbers in this line stamped into the hood (under top edge near corner by driver), the soft top (near where the release lever is when it's closed), and on the hard top (underneath the back window). These three spots should have the same number as on the plate. Also, regarding the VIN, it should be on a plate on the firewall or in the driver's door jamb. This VIN (113.143-10-0xxxxx) would also be stamped into the passanger side front frame rail. It will be difficult to find, but it's under the intake manifold, near where the large rubber air hose meets the manifold. This is just another originality check.
Have fun with your decision!
Rodd
Powell, Ohio, USA
1966 230SL, Euro, Auto, Leather, both tops
1994 E420