Does the 01 500 engine have the same problem with timing chain as the older MB V8 engines?
My SL500 have 115000 miles. What should I do of preventive maintenance?

I just got the car, and I reckon it has received only "normal" MB service.
Anything to look out for, change or adjust?

Per

If the normal maint has been done then I would say there is nothing to worry about. At that mileage I wouldn't suspect anything is going to go wrong but if anything, the chain tensioner 'may' have to be replaced by 150K (?). I did mine at 140K. This is just me but I think your motor is just settling in/broken in.

Even tho my fav local dealer is very, very small (6 techs) they have never had to replace a chain on a M117 or M119 V8 motor (I was told). They have several 200,000+ mile cars that they maintain. And when I bought my V8 with 100K all those years back I had the same concerns as you.

The chain will most likely audibly let you know it needs help. Drive sensibly and change oil often and there should be no problems. Those are my 2 cents.

__________________
Jim

1992 500E
2007 CLK63
2003 Audi RS6
2001 Audi allroad