start up

We spend part of our lives outside the UK and during that period, obviously my car is not used. It's a 2012 E250CDI, with only 4,000 miles on it, and it's been in an unheated but dry garage, since mid-December. We'll be back next week. What precautions should I take in terms of getting the...

Hi all, I get a puff of smoke on start-up now and again, especially when the car has been standing. I believe it is the oil seals on the end of the valve stems, which harden with age. Anyone know if this is likely and how difficult it is to replace them? I guess it's a job for a...