The car drove well since day one, only having to have the glow plugs replaced 18 months ago. Now, after the 'engine diagnostic light' cam on (Oct 2014), I gave the car in to Mercedes Brentford, to check the reason. The car was still driving well even then. The technicians came up with loads of 'faults' including crank and ex back pressure sensors, turbo seals and boost seals leaking, plus gearbox sump gasket leaking. Whilst doing the above, they also changed the V Belt, and the automatic transmission fluid. I ended up paying £1300 for the privilege !!! Three weeks later, on the way back from Portsmouth, the car suffered power loss, and would take ages to accelerate upto 60 mph or more... I took the car to Mercedes Brentford again, and this time they said that the quick test showed that the 'turbo and or manifold' may be required.... And this would cost anything from £1600 to £4000 to fix.. !!! I declined this, as I couldn't afford that kind of payment so soon after paying £1300 only weeks before, and also because the car was driving normallly again, after the engine had been turned off then back on... Another week after this, I find that the 'pre-glow' signal, come on after the engine is started and then remains on for 30 seconds or so after, and then goes back off... The glow plus were all replaced under two years ago!!!

Do you think this could be due to 'improper' work by the Brentford technicians, now that all these problems are appearing suddenly, or could this be an real engine fault. I had written to MBUK, but they were unhelpful in this matter, suggesting that the age of the car goes against it..even though it has low mileage.

The car has only got 45k miles on the clock. Any insight would be much appreciated.