Just got the car. What should I do? Simply replace the oil with Mobil 1 synthetic every 5000 miles or so, or should I first use some engine flush (which one?) and replace oil every 5kmi?

Is there another synthetic oil that is more detergent?

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2008 S550
2010 GLK350
1997 E420 (retired)
2005 CLK500 (retired)

Yes, more frequent oil changes will HELP.

Also before changing oil add special cleaning agent to oil run engine for specified time (ie: 30 minutes at idle) & then change the oil.

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MERCEDES Benz Master Guild Technician (6 TIMES)
ASE Master Technician
Mercedes Benz Star Technician (2 times)
44 years foreign automotive repair
27 Years M.B. Shop foreman (dealer)
MB technical information Specialist (15 years)
190E 2.3 16V ITS SCCA race car (sold)
1986 190E 2.3 16V 2.5 (sold)
Retired Moderator

I've used Auto RX before, it seemed to work well at removing old gook deposits.

-Jason

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1991 350SDL. 230,000 miles (new motor @ 150,000). Blown head gasket

Tesla Model 3. 205,000 miles. Been to 48 states!
Past: A fleet of VW TDIs.... including a V10,a Dieselgate Passat, and 2 ECOdiesels.
2014 Cadillac ELR
2013 Fiat 500E.

Yes, Auto RX would be my choice. My '93 300CE hadn't had the oil filter changed in 50K. It was a solid black piece of sludge. The removal of the valve covers showed a horrible sight. After 10K and two Auto RX doses, it is as clean as a whistle, and runs a lot quieter.
Anziani
'93 300CE 181K
'95 E420 118K

Drop your change interval to 2K and add detergent right before fill..

After 4-5 changes should look much improved.

Jonathan

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Blue Ridge Mercedes
Jonathan Hodgman
http://www.blueridgemb.com/
Enthusiast Service, Restoration & Tuning.
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