If you know that the timing chain is in good shape and you use the timing pin lock, you don't need the A/B light.

You'll also want an intake manifold gasket and possibly new plastic clips and rubber pads for your injection lines. The intake manifold needs to come out to do the IP. I'm sure you could do it with it in place, but it's a frustrating enough job with adequate clearance.

Having swapped the IP more times than anyone ever should in a single engine, it helps to have a 2nd person assist you when lining up the IP and installing the bolts. The tensioner gets in the way and can be a real PITA if you're trying to balance the IP and make sure everything is in the right place.

Another experience call: File the slot in the timing lock pin deeper. Use the side of a file to cut a square-profile slot in it. The face of the tool has a V-shaped notch in it (but the pin on the IP is square-profile). It doesn't do that great of a job securely holding the pin from moving. Believe me, you don't want to install the IP and discover AFTER you put the bolts in that the tool came loose and the pin moved.

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Current stable:
1995 E320 157K (Nancy)
1983 500SL 125K (SLoL)

Gone but not forgotten:
1986 300SDL (RIP)
1991 350SD
1991 560SEL
1990 560SEL
1986 500SEL Euro (Rusted to nothing at 47K!)

Gone and wanting to forget:
1985 524TD 167K (TotalDumpster™) [Definitely NOT a Benz]