bugelrex

Since dealers charge such a crazy markup for the adblue topup, doing yourself seems pretty easy. However...

If you needed a warranty repair on the engine or other mechanical part, is your warranty voided because they can see you never serviced the adblue via the dealer?

I heard similar stories from owners who did not do oil changes at dealers. I'm starting to wonder if the GLK250 is ever going to see cost savings if you only drive 12k miles a year...

Gt. Dane

If you read page 158 of your manual it tells you how to add this fluid. If it voided the warranty they would not do that. Dealers charge $2 per litre in Canada for the DEF and the tank holds 27 litres.

For the A service I believe that the cost includes draining the tank and adding fresh. The difference in cost at my dealer between the gas and diesel service is $70 and both have the same capacity engine oil.

glayfan40

Provisions for draining the DEF tank every 20K miles or 2 yrs have been removed from the maintenance manuals for MY2013/2014. As long as you drive regularly and refill as necessary you shouldn't have to worry about DEF crystalizing. Other members have posted DIY instructions on how to best fill the tank previously. Do a quick search and save yourself 2/3 of the cost as compared to having the dealer do it.

JALLEN4

By federal law, the manufacturer cannot void the warranty for your actions unless they can prove your actions caused a particular failure that they are refusing to repair under warranty.

coda1970

The best way to understand your warranty rights is found on the Federal Trade Commission's website. Short answer is no it won't void your warranty if you use the proper fluid.

Here is the link for your rights and complaint procedures if you feel you aren't treated fairly.

http://www.consumer.ftc.gov/articles...ne-maintenance

bugelrex

I guess I should video myself filling the tank just incase lawyers need to get involved. I guess the worst case is that every warranty claim will be denied because of DIY DEF which results in a lawyer to win the case.

I would not be surprised if MB has this policy "DIY service (eg oil, DEF) = warranty denial, wait for customer's lawyer..."

dgiturbo

They have been sued enough times in other similar instances to not have this policy.
But I would keep all DEF purchase receipts.

davezaristo

I have been refilling my e-class bluetec with DEF @ $5.99 per gallon at oreilly..works just fine and all it is just pour it in..not sure how that can void your warranty..