I want to put 20" rims on my Benz, and put a sound and secur

I want to put 20" rims on my Benz, and put a sound and security system in. Can Mercedes certified place do it?

NO Mercedes Benz certified shop will do this, if they want to keep their cerification. The bigger rims violate the car's warranty. It also seriously effects one or more of these systems: safety, steering, braking, alignment, speedometer and transmission. There are lots of non certified shops that will be happy to do as you ask, but, they are not looking out for your safety, only their wallets.

IF you're still interested in installing the rims, contact your nearest Mercedes Benz dealer and ask them.

I hope this helps

You do not identify what model you drive. If it's an car, 20" wheels are only going to destroy your handling and the car's performance, not to talk about void the warranty if it's still effectively. Any wheel change involving spacers will void your warranty. The biggest AMG wheels I can think of are 19" and could still degrade ride and performance if placed on the wrong car and no MB shop or dealer is going to do that for you.

The whole point of a bigger wheel with a lower profile tire is to enhance handling under racing conditions on cars intended to be driven under those conditions. The current trend is to put giant wheels on anything that rolls, making a fool out of the owner and making a car that is beside impossible to drive, less enjoy. Much like a grill on healthy teeth that promotes stains and decay, ruining them, the same goes for the big wheel fad.

If you want HP wheels, your dealer can fix you up with a size and style that requires no spacers and looks great, not to talk about you will not be snickered at by other MB drivers who know you did something really silly to a good car for the sake of a passing fad.

If you are out of warranty, be sure you go to a reputable shop, just like the other answerer said, the places that trick out cars and turn them into death traps you can not pull into a parking lot in only want your money.