The liquid in the injector well is condensed oil from the PCV system. Mine has it too...

Do yourself a favor and buy some new injector line clips and shims. I believe I can see rust on one line where it's been vibrating against the mount because it's not clipped. I've never seen it happen but I can imagine that this will eventually fail depending on how long you own the car.

Part numbers are:

601 078 03 86 for the shims and

603 078 01 41 for the clips.

7 are required but you may want a couple more of the plastic clips incase of future breakage. They're really cheap.

__________________
-Evan


Benz Fleet:
1968 UNIMOG 404.114
1998 E300
2008 E63


Non-Benz Fleet:
1992 Aerostar
1993 MR2
2000 F250