Date registered: Dec 2005
Vehicle: W211 E320 Bluetec R129 SL500 - $1300 car ........ Ford F350 6l
Location: CA Bay Area
Mentioned: 9 Post(s)
Quoted: 1047 Post(s)
Definitely turbo, or not has nothing to do with the issue.
You have remote/locking system that was used for 2 years only and is pretty rare.
The issue with key recognition has some topics in W210 section and I advise you to do search there. I don't think missing pump should affect starting the engine, but than those electronic systems are interlocking with each other, so it might be possible.
Welcome to the forum.