Lechus

So i have the option of buying a 2017 cls 550 with a little less than 50k miles and it was maintained perfectly. I plan on tuning and modifying it but I'm afraid of the reliability and that it will be too heavy to be fast.

should I get an extended warranty? What is reliability looking like after tuning and modding?
And how fast can I make this without sacrificing reliability too much?

Edit: Also how much does it cost to tune? I saw figures of 580-600 with a tune, downpipe, and exhaust

Highline-Autos.com

Give it a test drive and see if you really need the extra power from a Tune. Extended Warranty coverage on the CLS model is actually very affordable. Here is some extended warranty information for your potential purchase from our providers Fidelity and Freedom Warranty, repairs accepted at all Mercedes-Benz dealerships and licensed independents in the US/Canada. You can reach me at tgibson@highline-autos.com or (855) 924-1333 if you have any questions or would like to see example contracts that explain coverage.

'17 MB CLS550 w/ 49K miles

Freedom Warranty Complete Manufacturer's Extension:
36 months / up to 100k miles
$0 deductible
-$3,907
$100 deductible
-$3,757

48 months / up to 100k miles
$0 deductible
-$4,046
$100 deductible
-$3,896

60 months / up to 100k miles
$0 deductible
-$4,255
$100 deductible
-$4,105

72 months / up to 100k miles
$0 deductible
-$4,464
$100 deductible
-$4,314

84 months / up to 100k miles
$0 deductible
-$4,673
$100 deductible
-$4,523

Fidelity Platinum:
36 months / additional 36k miles:
$100 deductible
-$7,536
$250 deductible
-$6,457
$500 deductible
-$5,437

48 months / additional 48k miles:
$100 deductible
-$9,465
$250 deductible
-$7,924
$500 deductible
-$6,468

60 months / additional 30k miles:
$100 deductible
-$9,519
$250 deductible
-$7,966
$500 deductible
-$6,488

60 months / additional 60k miles:
$100 deductible
-$10,069
$250 deductible
-$8,384
$500 deductible
-$6,792

ALL TAX INCLUDED