I hope Bill is not offended by my saying this, but you can get the job done without the large third wrench without too much trouble. The retainer wrench is handy, but you can cut and try a little with the two bent wrenches and get them dialed in without too much trouble.
If your wrenches are bent so that they clear the injectors okay, you should be able to move the adjustment a little, lock and check. If you need to adjust some more, just unlock and tweak it a little in the desired direction.
In the course of trying to get my daughters car going this week I adjusted the valves and didn't even mess with the third wrench. It's handy, but you can get it done.
'01 C Class, Six Speed
'84 Euro 240D, manual, 533K miles
'88 300E 5 Speed
'81 300D Daughter's Car
Over 800,000 miles in