Mercedes-Benz S-Class - a good used buy?

I am looking to buy a 2006 S-Class W221 which has done 98K miles and comes with 1 year dealer warranty. it has been converted to LPG. Can I ask how expensive is it to maintain and service the car. Are parts fairly cheaply and easily available these days from third party? Are these quite reliable cars?

Asked on 21 October 2015 by drsaurabhg

Answered by Honest John
Very expensive to maintain, which is why values of S-Class drop so heavily. Not particularly reliable. And if it is an S350 petrol model that engine is very suspect even without being converted to LPG. So save yourself a lot of money and heartache by not buying it.
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