[GTO]

See,here both IBM and the assembler uses the same components,IBM charges you 15K more for better assembly and Integration.Same goes for the builder.
An automobile is a completely different matter,the premium cars are much more complex than their cheaper counterparts.

Again, the question is NOT of complexity. It is of getting my moneys worth in terms of reliability. When a 5 lakh rupee car can run for 100K kilometers without failing engine mounts, air-conditioners, suspensions etc., why should I tolerate my 30 lakh sedan requiring these changes. I know a thing or two about complexity but no stats, clarifications or quality comments even amount to dog pile if the product cant hold up well, in the long term.

radar sensors.........People see this as a problem,but it is not,they don't bother to read their manuals.

Lets not deviate from the topic at hand. I am talking about simple engine mounts here...not technology-laden radar sensors. Talking about product familiarity has no relevance to the topic.

Do you feel any unusual vibrations from the car or some strange sounds etc.If yes then there may be an issue otherwise i won't trust a Mercedes dealer.40K Kms is little to premature for them to wear out,most last about 80K Kms but some have been known to fail early.Bad quality or bad road conditions,I'm not aware.

Gimme a break! Now you are getting road conditions into the picture? Man, my C Class has not been used in the National Rally Championship. And for the record, other cars transverse down the same urban roads for several more than just 40K kms to require an engine mount change.

To answer your question : Yes, I do feel engine vibrations and am convinced myself that the mounts have worn out.

Reliability yes,not 100% but they are improving at a great pace and are back from their worst in the late 90's and early 2000's.As for quality of the materials most articles i have read say that the quality is back to being among the best with the W221 S and W204 C (not my opinion as i haven't seen the interior).

I don't argue with the fact that they have improved. But the truth is, the improvement is still not enough. You have read articles that speak about the best quality. I am, and interact with actual owners. Therein lies the difference.

Also, the W221 & W204 articles only speak about material quality (interiors, switches, paint finish etc.) and NOT long-term reliability which my post is about. Apples to apples, Merve.

You can't expect a 100% turnaround with the same product as it cannot be completely reworked.The new C-class will give a better perspective where the turnaround stands.

The new S-Class, with its reliability failures, has already given me the best perspective. Again, this is based on information that is straight from the horses mouth (read : actual owners).