slk55er

I took my 2019 CLS 53 in for the rear diff oil change mentioned on page 9 of the CLS Supplement book and identified as a covered item under prepaid maintenance. But when the dealer called up my VIN, it showed that this was not "required". There is some confusion on this and it may depend on whether the differential on the 53 is a"locking differential". Since this is identified as covered under prepaid maintenance which I have and since it seems there would be no harm done in replacing this fluid, the dealer agreed to go ahead and replace the fluid at no charge. Additional clarification of this would be helpful.

Rick2019

How many miles are on the vehicle?

slk55er

The CLS manual says to change it at 2,000 miles.I am traveling and currently have 1,650 miles and had a choice I'm doing it now or at 2400 miles. My dealer said it's better to do it early rather than late.

petee1997

I'm going to be late. My car has 4500 kms. It was due at 3000 kms. But as discussed, it all may be for naught.