'The Doors' Guitarist Loves Her Madly Drops $45K Surprise On Wife

4/15/2012 5:30 AM PDT
Doors guitarist Robby Krieger
After 40 years of marriage, Doors guitarist Robby Krieger still knows how to light her fire -- dropping $45,000 on a brand new Mercedes SUV for his wife ... and TMZ has a pic of the new whip.

Sources tell TMZ, the former rock star rolled up to a Benz dealership in Long Beach, CA last Monday -- eyeing up a snazzy ML 350 SUV for his wife.

But wife shopping is hard -- and once Robby called to consult his better half ... we're told she shot him down, asking for the slightly smaller GLK 350 instead (see sample comparison below).

0412_mercedes_benz_mbusaWe're told Krieger didn't bat an eye -- and immediately catered to his wife's wishes, wiring over $45K to the dealer in exchange for a fully-loaded silver 2012 GLK 350.

And that's how you stay married.