New guy, old question?? 2.3-16 190E

[slitherwick48]

My wife has a German spec 190E, 2.3-16 valve. It has only 83k miles on the clock and she is having problems starting it at times. At other times, if she has had it running and then shuts it off, it may be 5-15 minutes before she can start it again. I took it to the diagnostic center here in England and was told that

"there is fuel up to the 'plenum' but when it was hot, no fuel to the injectors". the tech also said that,

"there might be a weak spring in the 'plenum' or the seals may be dry, and may not be allowing the 'metering rod' to reposition, thus preventing the proper fuel/air ratio required for ignition".

A few times, when she has let off the accelerator, the engine has died and it's taken her about 5-10 minutes to restart it. That is dangerous on a busy road.

As I am new to these particular engines, I must ask, is there any credibility to what he is saying and/or is it something else. Once it is up and running, it has very credible performance. This was proven in Germany, before coming up here to England, when the Polizei were slowing traffic down due to a major truck accident further up the Autobahn. I was told I was doing 235 KPH, should be prepared for the accident, and slow it down.

Any help would be appreciated.

Slitherwick48