Sell it,

Mannai servicing are one of the dodgiest in Qatar.

I have the same car as you. Bought second hand and was a great car until I took it to them.

They have broken the cat converter, (Offered to replace it for Qr 16000, no chance), crashed it into a wall in the workshop (gave a free oil change yippee), Alternator lasts 8 months (You guessed it warranty lasts 6 months, 4000 each). Just been for another service (Long story they forgot to do it) they have dinged the same bumper again. (This time not owning up to it).
Here's a tip. After servicing re-fit your wheels. The clanking noise is a free extra that they provide. Oh and check anything they have touched. Like radiator cap not tightened. Don't pay for their car wash. Waste of time and money. Get a cheaper one on Salway road, they are professionals.

Totally incompetant.