Sorry to revive this thread, just wanted to give everyone an update on the situation - for those who're interested.
After about 3 weeks of parking the Mercedes down Mercedes Service Centre, I finally had the car towed to the mechanic. The place was recommended by a friend of mine, and said the owner was originally working for Mercedes (very nice bloke he is)
So far the price was £180 for 2 inspection sessions (£90 per hour for car inspection) at Mercedes.
Towing the car to the mechanic 17 miles away from RAC costed £119.
The car arrived at mechanic on Friday late late afternoon 5pm, the bloke who ran the place went through the report printed out by Merc service centre and had a laugh about the quoted price + problems listed on it.
For those who are interested, I can provide that list here once I retrieve the car, but on top of my mind, few things that was listed on the report were:
- Break fluid might be contaminated, so change that would be £400 ish.
- Rare spring show sign of corrosion
- Under plate were missing
- A tyre require replacing.
So only then we realised the report did not list anything about why my car cannot get into shift (engine wouldn't switch on)
I left the car over the weekend and received a call on Monday morning - the cause was due to a broken oil pump. With no petrol being pumped into the engine, that's the reason why the engine wouldn't start up.
By the same afternoon around 5pm, my car was already fixed. An oil pump costed £210 with labour about £300ish.
Lesson learned.