[cwmoser]

I don't know much about D-jet fuel injection but over the years have read that they are tricky to fix and adjust.
I think $22K is too much to pay for a 1972 model year. I wouldn't even consider that price for a pristine example with manual transmission - JMPOOC.

If you like the styling of these type R107 Mercedes and $22K is in your budget, I would look at the 1980's version of these cars - either 1989-1986 560SL or the 1981-1985 380SL. You should be able to find a really nice well maintained driver example of the 560SL for $22K and under, and a really nice well maintained driver example of the 380SL for even less. For the 380SLs, just make sure that the single row timing chain has been converted to dual row timing chain. The 560SLs are the most refined models of these series of Mercedes R107s. The later model years 450SLs are desirable, in my opinion, like the 1977-1980 450SLs. Of course, I would seriously consider any year of the R107 model year run (1971-1989) if it had Euro bumpers and Manual Transmission.

I have both a 1983 380SL and a 1986 560SL and both of my cars are quite easy to work on and a pleasure to drive. When I say "easy to work on" I mean take advantage of this forum's collective knowledge here to learn about maintenance and repairs and you should be able to do most of the wrenching yourself. Do prepare that there is going to be some "wrenching" and don't think you can take it to any shop to get things fixed. In addition, shops that can properly work on these cars are going to considerably lighten your wallet. For most of us here, hiring out work to be done is pretty much out of the question.

"Adopting" an R107 Mercedes could be a long life experience. If you enjoy learning and really get into these vintage Mercedes you likely will make this an enjoyable hobby for many years. I've enjoyed my 380SL for getting close to 40 years and like many folks here its our main hobby and "obsession" ... cheaper than playing Golf and hitting bars

So in summary, $22K is a little too rich for what I have read so far - maybe some others can chime in.