Replacing "injector seals", simpe or time consuming?

[86560SEL]

Sorry- I meant to put "simple" on the topic, not "simpe".

Did a search- no luck.....

As some of you know, my cars missing/stalling was diagnosed as having "fuel injector seal" leaks. The tech said that it will run about $185. to replace and that the valve covers also have to be removed, requiring more $$. He said it needed injector "seals AND cups". What are the cups?

I was thinking of seeing if our other mechanic may be able to do it, but wondering what all in fact is indeed involved before I check. Do the valve covers have to be removed? What all else and are they difficult to get to? Seems like they are cheap, only about $3.00 each, so I am wondering what all else would have to be replaced with them, or it is as simple as replacing those seals only? If he is able to do it and at a reasonable rate, I will go ahead with the repair.... if not, the car will be sold. BTW, the car is a 85' 380SE.

Here is the link to the seals. http://catalog.eautopartscatalog.com/mercedesshop/sophio/wizard.jsp?partner=mercedesshop&clientid=catalog.mercedesshop&baseurl=http://catalog.peachparts.com/&cookieid=20Y01UKF920Y01UQCS&year=1985&make=MB&model=380-SE-001&category=C&part=Fuel+Injector+Seal

Thanks in advance.