Give the guy a break! He obviously isn't a Diesel MB guy. He could be a great Toyota, or Ford mechanic. Just becuase is isn't a MB guru like the folks around here, doesn't make him a bad mechanic. That said I too would suggest a different mechanic. Find one that know MBs, and if you can find one that knows diesel MBs even better.

You should be able to lock and unlock you door locks many times without problems. If you can't you have a vac leak somewhere.

For cold starting most of the time all you have to do it give the car an extra glow cycle or two and she should fire right up.

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